Question

A)3 (x - 12) - 160 = 3 (2 x - 4 + 3 x)

B)3 x + 25 = 190

C)4 X - 300 = 2 x + 180

D)4 (3 x + 4) = 3 (x + 5)

E)3 (x + 10) = 120 + 2 (x - 10)

F)- 5 (x + 18) = -2 (- 12 x - 20)

G)- 3 (14 x - 15 ) = - 2 (- 12 x - 16 )

Answer 1

A) 3(x - 12) - 160 = 3(2x - 4 + 3x)
3x - 36 - 160 = 6x - 12 + 9x
3x - 15x = 196 - 12
- 12x = 184
x = - 184/12 = - 92/6 = - 46/3

B) 3x + 25 = 190

3x = 190 - 25

3x = 165

x = 55

C) 4x - 300 = 2x + 180

2x = 480

x = 240

D) 4(3x + 4) = 3(x + 5)

12x + 16 = 3x + 15

13x = - 1

x = -1/13

E) 3(x + 10) = 120 + 2(x - 10)

3x + 30 = 120 + 2x - 20

x = 70

F) - 5(x + 18) = -2(-12x - 20)

-5x - 90 = 24x + 40

-29x = 130

x = -130/29

G) - 3(14x - 15) = - 2(-12x - 16)

- 42x + 45 = 24x + 32

- 66x = - 13

x = 13/66