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a) 80 - [130 - (12 -4)2 ]
= 80 - ( 130 - 82 )
= 80 - 116
= -36
b) 541 + (218 - b) = 735
218 - b = 194
b = 24
c) 5(x + 35) =515
x+35 = 103
x = 68
d) 96 - 3(x + 1) = 42
3(x+1) = 54
x+1 = 18
x = 17
12x - 33 = 32 . 33
12x - 33 = 243
12x = 276
x = 23
a, 541 + (218 - x) = 735
218 - x = 735 - 541
218 - x = 194
x = 218 - 194
x = 24
Vậy x = 24
b, 5(x + 35) = 515
x + 35 = 515 : 5
x + 35 = 103
x = 103 - 35
x = 68
Vậy x = 68
c, 96 - 3(x + 1) = 42
3(x + 1) = 96 - 42
3(x + 1) = 54
x + 1 = 54 : 3
x + 1 = 18
x = 18 - 1 = 17
Vậy x = 17
d, 12x - 33 = 32 . 33
12x - 33 = 35
12x - 33 = 243
12x = 243 + 33
12x = 276
x = 276 : 12
x = 23
Vậy x = 23
Ủng hộ mk nha !!! ^_^
c)96-3(x+1)=42
3(x+1)=96-42
3(x-1)=54
(x+1)=54:3
(x+1)=18
x=18-1
x=17
a, 541 + [218 - x] = 735
[ 218 - x ] = 735 - 541
[ 218 - x ] = 194
218 - x = 194
= 218 - 194
=24
541 + (218 - x) = 735
218 - x = 735 - 541
218 - x = 194
x = 218 - 194
x = 24
5(x + 35) = 515
x + 35 = 515 : 5
x + 35 = 103
x = 103 - 35
x = 68
96- 3(x + 1) = 42
3(x + 1) = 96 - 42
3(x + 1) = 54
x + 1 = 54 : 3
x + 1 = 18
x = 18 - 1
x = 17
12x - 33 = 32.32
12x - 33 = 81
12x = 81 + 33
12x = 114
x = 12
541 + (218-x) = 735 5(x+35)=515
218 - x = 735 - 541 x+35 = 515:5
218 - x = 194 x +35 =103
x = 218-194 x = 103-35
x = 24 x = 68
96-3(x+1) = 42 12x - 33 = 34
3( X+1)= 96 - 42 12x-33 = 81
3( x+1) = 54 12x = 81+33
x +1 = 54:3 12x = 114
x +1 = 18 x = 114:12
x = 18-2 x = 12
x = 16
Bài này lm lâu lm đó nhớ k mik nha
a) 541 + ( 218 - x ) = 735
218 - x = 194
x = 24
b) 5 ( x + 35 ) = 515
x + 35 = 103
x = 68
c) 96 - 3 ( x + 1 ) = 42
3 ( x + 1 ) = 54
x + 1 = 18
x = 17
d ) 12x - 33 = 3 2 * 3 3
12x - 33 = 243
12x = 276
x = 23
a; 218-x=735-541
218-x=194
x=218-194
x=24
b; x+35=515/5
x+35=103
x=103-35
x=68
c;3*(x+1)=96-42
3*(x+1)=54
x+1=54/3
x+1=18
x=18-1
x=17
d;12x-33=243
12x=243+33
12x=276
x=276/12
x=23
a. 541+(218-x)=735
=> 218-x=735-541
=> 218-x=194
=> x = 218-194
=> x = 24
b. 5(x+35) = 515
=> x+35 = 515:5
=> x+35 = 103
=> x = 103-35
=> x = 68
c. 96-3(x+1)=42
=> 3(x+1)=96-42
=> 3(x+1)=54
=> x+1=54:3
=> x+1=18
=> x=18-1
=> x=17
d. 12x-33=32.33
=> 12x-33=9.27
=> 12x-33=243
=> 12x=243+33
=> 12x=276
=> x=276:12
=> x=23
a) 541 + ( 281 - x ) =735
=>281-x=735-541
=>281-x=194
=>x=87
b)5.(x+35) = 515
=>x+35=515:5
=>x+35=103
=>x=68
c)96 - 3.( 9x+1) =42
=>3(9x+1)=96-42
=>3(9x+1)=54
=>9x+1=18
=>9x=17
=>x=17/9
d)12x-33=32*33
=>12x-33=9*27
=>12x-33=243
=>12x=276
=>x=23
b. 33 . 18 - 33 . 12
= 27 . 18 - 27 . 12
= 27 . ( 18 - 12 )
= 27 . 6 = 162
2. a. { [ ( 16 + 4 ) : 4 ] - 2 } . 6
= { [ 20 : 4 ] - 2 } . 6
= { 5 - 2 } . 6
= 3 . 6 = 18
b. 60 : { [ ( 12 - 3 ) . 2 ] + 2 }
= 60 : { [ 9 . 2 ] + 2 }
= 60 : { 18 + 2 }
= 60 : 20 = 3
3. a. 541 + ( 218 - x ) = 735
218 - x = 735 - 541
218 - x = 194
x = 218 - 194
x = 24
b. 5 ( x + 35 ) = 515
x + 5 = 515 : 5
x + 5 = 103
x = 103 - 5
x = 98
c. 96 - ( x + 1 ) = 42
x + 1 = 96 - 42
x + 1 = 54
x = 54 - 1
x = 53
d. 12x - 33 = 32 . 33
12x - 33 = 9 . 27
12x - 33 = 243
12x = 243 + 33
12x = 276
x = 276 : 12
x = 23