Question

2x + 5x - 5x = -1 conta armada

Answer 1

$2x + 5x - 5x = - 1 \\ 2x = - 1 \\ x = \frac{ - 1}{2}$

Answer 2

$2x + 5x - 5x = - 1$

Cancele 5x com -5x

$2x = - 1$

Passe dividindo

$\boxed {x = - \frac{1}{2}}$