\(3x-6=102\\ 3x=96\\ x=32\)

a)                                                                   

219-7(x+1)=100                                           

=>7(x+1)=219-100                                   

=>7(x+1)=119

=>x+1=119:7

=>x+1=17

=>x=16

A) 7(X+1)=219-100

  7(x+1)=119

x+1=17

x=17+1

x=18

b)3x.6=54:3

3x.6=18

3x=18:6

3x=3

x=3:3

x=1

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(3x-6)x3=34

3x-6=34:3

3x-6=34/3

3x=34/3+6

3x=52/3

x=52/3:3

x=52/9 tick tui nha Dương Ngọc Quỳnh Anh

a)   x + 118 = 218

x = 218 – 118

x = 100

b)   18 – x = -17

X = 18 – (-17)

X = 35

c)    (-18) – x = -17

X = (-18) – (-17)

X = -1

d)124 + (118 – x) = 217

118 – x = 93

X = 118 – 93

X = 25

e) (3x – 6).3 = 3⁴

(3x – 6).3 = 81

3x – 6 = 27

3x = 33

ð X = 11

g) 23.(42 – x) = 46

42 – x = 2

ð X = 40

h) 84 – (3x + 8) = 34

3x + 8 = 84 – 34

3x + 8 = 50

3x = 50 – 8

3x = 42

X = 42 : 3

ð X = 14

i)               3.(2x + 1) – 19 = 14

3.(2x + 1) = 14 + 19

3.(2x + 1) = 33

2x + 1 = 33 : 3

2x + 1 = 11

2x = 11 – 1

2x = 10

X = 10 : 2

ð X = 5

k) 6x – 302 = 2³.5

6x – 302 = 40

6x = 40 + 302

6x = 342

X = 342 : 6

ð X = 57

m) (x – 1)² = 81

(x – 1)² = 9²

ð X – 1 = 9

ð X = 9 + 1

ð X = 10

n) 2^x+1 – 5 = 27

2^x+1 = 27 + 5

2^x+1 = 32

2^x+1 = 2⁵

ð X = 4

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120 + (34 + 3x) + (6 + x) = 0

=> 120 + 34 + 3x + 6 + x = 0

=> (120 + 34 + 6) + (3x + x) = 0

=> 160 + 4x = 0

=> 4x = -160

=> x = -160:4

=> x = -40

1)-(-3)³-(2x+1)³=152

     27-(2x+1)³=152

          (2x+1)³=-125

           (2x+1)³=(-5)³

              2x+1=-5

            2x=-4

              x=-2

2)-(x+6)-34=12+3x

   -x-6-34=12+3x

   -x-3x=12+6+34

      -4x=52

         x=-13

a, 5(x – 7) = 0

x – 7 = 0

x = 7

b, 95 – 5(x+2) = 45

5(x+2) = 40

x+2 = 8

x = 6

c,  6 2 x + 2 3 + 40 = 100

6(2x+8) = 60

2x+8 = 10

x = 1

d, 3(3x+9)+6 = 96

3(3x+9) = 90

3x+9 = 30

3x = 27

x = 9

e,  2 6 + 5 + x = 3 4

5+x = 81–64

5+x = 17

x = 12