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2130 - ( x + 130 ) + 72 = - 64
2202 - ( x + 130 ) = - 64
x + 130 = 2202 + 64
x + 130 = 2266
x = 2266 + 130
x = 2396
\(|x|-5=-1\)
\(|x|=-1+5\)
\(|x|=4\)
\(\Rightarrow\orbr{\begin{cases}x=4\\x=-4\end{cases}}\)
\(|x+2|-12=-1\)
\(|x+2|=-1+12\)
\(|x+2|=11\)
\(\Rightarrow\orbr{\begin{cases}x+2=11\\x+2=-11\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=11-2\\-x=-11-2\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=9\\x=-13\end{cases}}\)
135 - ( 9 - x ) = 35
135 - 9 + x = 35
126 + x = 35
x = 35 - 126
x = - 91
15 - ( -x + 18 ) = - 24
15 + x - 18 = - 24
- 3 + x = -24
x = - 24 + 3
x = - 21
2130-(x+130)+72=-64
2130-(x+130)=-64-72
2130-(x+130)=-136
x+130=2130-(-136)
x+130=2130+136=2266
x=2266-130
x=2136
b)x-(-x+15)=17
=>x+x-15=17
=>2x-15=17
=>2x=17+15=32
x=16
đúng thì ****
a) 2130 - ( x + 130 ) + 72 = -64
( x + 130 ) + 72 = 2130 - -64
( x + 130 ) + 72 = 2194
( x + 130 ) = 2194 - 72
x + 130 = 2122
x = 2122 - 130
x = 1992
a.
\(\left(3x-2^4\right)\times7^3=2\times7^4\)
\(3x-2^4=2\times7^4\div7^3\)
\(3x-16=2\times7\)
\(3x-16=14\)
\(3x=14+16\)
\(3x=30\)
\(x=\frac{30}{3}\)
\(x=10\)
b.
\(2130-\left(x+130\right)+72=-64\)
\(2130-\left(x+130\right)=-64-72\)
\(2130-\left(x+130\right)=-136\)
\(x+130=2130+136\)
\(x+130=2266\)
\(x=2266-130\)
\(x=2136\)
c.
\(15-\left(-x+18\right)=-24\)
\(\left(-x+18\right)=15+24\)
\(-x+18=39\)
\(-x=39-18\)
\(-x=21\)
\(x=-21\)
d.
\(10-\left|x+3\right|=-4-\left(-10\right)\)
\(\left|x+3\right|=10+4-10\)
\(\left|x+3\right|=4\)
\(x+3=\pm4\)
TH1:
\(x+3=4\)
\(x=4-3\)
\(x=1\)
TH2:
\(x+3=-4\)
\(x=-4-3\)
\(x=-7\)
Vậy x = 1 hoặc x = - 7.
a) x + 10 = 20
<=> x = 20 - 10 = 10
Vậy x = 10
b) 2x + 15 = 35
<=> 2x = 35 - 15 = 20
<=> x = 10
Vậy x = 10
c) 3(x + 2) = 15
<=> x + 2 = 15 : 3 = 5
<=> x = 5 - 2 = 3
Vậy x = 3
d) 10x + 15.11 = 20.10
<=> 10x + 165 = 200
<=> 10x = 200 - 165 = 35
<=> x = 35 : 10 = 3,5
Vậy x = 3,5
e) 4(x + 2) = 3.4
<=> x + 2 = 3
<=> x = 3 - 2 = 1
Vậy x = 1
f) 33x + 135 = 26.9
<=> 33x + 135 = 234
<=> 33x = 234 - 135 = 99
<=> x = 99 : 33 = 3
Vậy x = 3
g) 2x + 15 + 16 + 17 = 100
<=> 2x + 48 = 100
<=> 2x = 100 - 48 = 52
<=> x = 52 : 2 = 26
Vậy x = 26
h) 2(x + 9 + 10 + 11) = 4.12.5
<=> x + 30 = 120
<=> x = 120 - 30 = 90
Vậy x = 90
a, -121 - [-35 - x] = 50
<=> -35 - x = -121 - 50
<=> -35 - x = -171
<=> x = -171 + [-35] = -206
Vậy x = -206
b, 17 + x - [352 - 400] = -32
<=> 17 + x - [-48] = -32
<=> 17 + x + 48 = -32
<=> 17 + x = -32 - 48
<=> 17 + x = -80
<=> x = -80 - 17
<=> x = -97
Vậy x = -97
c, 2130 - [x + 130] + 72 = -64
<=> 2130 - [x + 130] = -64 - 72
<=> 2130 - [x + 130] = -136
<=> x + 130 = 2130 - [-136]
<=> x + 130 = 2130 + 136
<=> x + 130 = 2266
<=> x = 2266 - 130 = 2136
d, |x| - 5 = -1
<=> |x| = -1 + 5
<=> |x| = 4
<=> x = 4 hoặc x = -4
e, |x+ 2| - 12 = -1
<=> |x + 2| = -1 + 12
<=> |x + 2| = 11
<=> x + 2 = 11 hoặc x + 2 = -11
<=> x = 11 - 2 hoặc x = -11 - 2
<=> x = 9 hoặc x = -13
f,g Tương tự
a) -121 - (-35 - x) = 50
-121 + 35 + x = 50
x - 86 = 50
x = 50 + 86
x = 136
b) 17 + x - (352 - 400) = -32
17 + x - 352 + 400 = -32
x + 65 = -32
x = -32 - 65
x = -97
c) 2130 - (x + 130) + 72 = -64
2130 - x - 130 + 72 = -64
2072 - x = -64
-x = -64 - 2072
-x = -2136
x = 2136
d) |x| - 5 = -1
|x| = -1 + 5
|x| = 4
x = 4; -4
e) |x + 2| - 12 = -1
|x + 2| = -1 + 12
|x + 2| = 11
x + 2 = 11; -11
x + 2 = 11 hoặc x + 2 = -11
x = 11 - 2 x = -11 - 2
x = 9 x = -13
f) 135 - |9 - x| = 35
-|9 - x| = 35 - 135
-|9 - x| = -100
|9 - x| = 100
9 - x = 100; -100
9 - x = 100 hoặc 9 - x = -100
x = 100 + 9 x = -100 + 9
x = 109 x = -91
a) (-x + 31 ) - 39 = -69 => -x + 31 = -69 + 39 => -x = -30 + 31 => -x = -61 => x = 61
b) -121 - ( 35 - x ) = 50 => 35 - x = -121 - 50 => x = 35 - ( -171 ) => x = 206
c) 17 + x - ( 352 - 400 ) = -32 => 17 + x + 48 = -32 => x = -32 - 48 - 17 => x = -97
d) 2130 - ( x + 130 ) + 72 = -64 => 2130 - ( x + 130 ) = -64 - 72 => x + 130 = 2130 - ( -136 ) => x = 2266 - 130 => x = 2136
e) | x | - 5 = -1 => | x | = -1 + 5 => | x | = 4 => x = 4
f) | x + 2 | - 13 = -1 => | x + 2 | = -1 + 13 => x + 2 = 12 => x = 12 - 2 => x = 10
=> x + 2 = -12 => x = -12 - 2 => x = -14
g) 135 - | 9 - x | = 35 => | 9 - x | = 135 - 35 => 9 - x = 100 => x = 9 - 100 => x = -91
=> 9 - x = -100 => x = 9 - (-100) => x = 109
h) || x - 5 | - 3| = 9 => | x - 5 | - 3 = 9 => | x - 5 | = 9 + 3 => x - 5 = 12 => x = 12 + 5 => x = 17
=> x - 5 = -12 => x = -12 + 5 => x = -7
=> | x - 5 | - 3 = -9 => | x - 5 | = -9 + 3 => | x - 5 | = -6 ( loại )
a)-x+8=-17 b)35-x=37 c)-19-x=-20 d)2130-(x+130)+72=-64 e)x-(-x+15)=17
-x=-17-8 -x=37-35 -x=-20+19 -(x+130)+72=-64-2130 x+x-15 =17
-x=-25 -x=2 -x=-1 -(x+130)+72=-2194 2x =17+15
x=25 x=-2 x=1 (x+130)+72=2194 2x =32
x+130 =2194-72 x =32/2
x+130 =2122 x =16
x =2122-130
x =1992
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a,(2x+7)+135=0 b, 1/2x-2/5=1/5
2x+7=0-135 1/2x=1/5+2/5
2x+7=-135 1/2x=3/5
2x=-135-7 x=3/5:1/2
2x=-142 x=6/5
x=-142:2 Vậy x=6/5
x=-71
Vậy x=-71
c, 10-|x+1|=5 d, 1/2x+150%x=2014
|x+1|=10-5 2x=2014
|x+1|=5 x=2014:2
*TH1:x+1=5 *TH2:x+1=-5 x=1007
x=5-1 x=-5-1 Vậy x=1007
x=4 x=-6
Vậy x=4 hoặc x=-6
a/ 2130-(x+130)+72=-64
\(2130-\left(x+130\right)=-64-72\) \(2130-\left(x+130\right)=-136\)\(x+130=2130+136\)\(x+130=2266\)\(x=2266-130\)\(x=2136\)vậy x=2136a/ 2130-(x+130)+72=-64
<=> -x-130+72+2130=-64
<=> x=2130+72-130+64=2136
b/135-|9-x|=35
<=> |9-x|=135-35=100
<=> \(\left[\begin{array}{nghiempt}9-x=100\\9-x=-100\end{array}\right.\)
<=>\(\left[\begin{array}{nghiempt}x=-91\\x=109\end{array}\right.\)
c/10-|x+3|=-4-(-10)
<=> |x+3|=10+4+(-10)
<=>|x+3|=4
<=>\(\left[\begin{array}{nghiempt}x+3=4\\x+3=-4\end{array}\right.\)
<=>\(\left[\begin{array}{nghiempt}x=1\\x=-7\end{array}\right.\)