Question

7×+8=4×-10 outra conta
4×-15=-2×+3 outra conta
2×-4-8=4×

Answer 1

7x + 8 = 4x - 10

7x - 4x = - 10 - 18

3x = -18

x = -18/3

x = - 6

4x-15=-2x+3

4x + 2x = 3 + 15

6x = 18

x = 18/6

x = 3

2x - 4 - 8 = 4x

2x - 4x = 4 + 8

- 2x = 12

x = -12/2

x = -6

Answer 2

Primeira
$7x - 4x = - 8 - 10$
$3x = - 18$
$x = - 6$
Segunda
$4x + 2x = 15+ 3$
$6x = 18$
$x = 3$
Terceira
$- 4 - 8 = 4x - 2x$
$- 12 = 2x$
$- 6 = x$