Question

essas tbm
1- 4x-8=12×-20
2- 2(3×+4)-(2×-5)=3x-12​

Answer 1

1- 4X-12X=-20+8
-8X=-12 .( -1 )
8X=12
X=12/8

2- 5X+8-(2X-5)=3X-12
5X-16X-40=3X-12
5X-16X-3X=-12+40
-14X=28 .( -1 )
14X=-28
X=-28/14
X=-2

Answer 2

Resposta:

x = 13/16

x = 1

Explicação passo-a-passo:

1- 4x-8=12x-20

- 4x - 7 = 12x - 20

- 4x - 12 x = - 20 + 7

- 16 x = - 13 . (-1)

x = 13/16

2- 2(3×+4)-(2×-5)=3x-12

2 - 6x - 8 - 2x + 5 = 3 x -12

- 8 x - 1 = 3x - 12

- 8 x - 3x = - 12 + 1

- 11 x = - 11 . (-1)

x = 1