Question

Qual a resposta -x-3=-3x+13

Answer 1

- x - 3 = - 3x + 13
- x + 3x = 13 + 3
2x = 16
x = 16/2
x = 8

Answer 2

$- x - 3 = - 3x + 13 \\2x = 16 \\ x = \frac{16}{2} \\ \boxed{x = 8}$