Question

A) 5(x-6)=3x+2
B)3/2+x=-2x+1
C)12x-17=15x-12

Answer 1

A) 5. (x-6) = 3x + 2

5x - 30 = 3x + 2

5x - 3x = 2 + 30

2x = 32

x = 32 / 2

x = 16

B) 3/2 + x = -2x + 1 (2)

6/2 + 2x = - 4x + 2

3 + 2x = - 4x + 2

2x + 4x = 2 - 3

6x = -1

x = - 1/6

C) 12x - 17 = 15x - 12

12x - 15x = - 12 + 17

- 3x = 5

x = - 5/3

Answer 2

Respostas:

A) 5.x - 30 = 3.x + 2

5.x - 3.x = 2 + 30

2.x = 32

x = 32 : 2 => x = 16............S = { 16 }

B) 3/2 + x = -2.x + 1

x + 2.x = 1 - 3/2

3.x = - 1/2

x = - 1/2 : 3

x = - 1/6..........S = { - 1/6 }

C) 12.x - 17 = 15.x - 12

12.x - 15.x = -12 + 17

- 3.x = 5

x = - 5/3........S = { - 5/3 }