Question

quanto vale x? 2x -12 4x + 12quanto vale x? 2x -12 4x + 12

Answer 1

$2x - 12 = 4x + 12 \\ 2x - 4x = 12 + 12 \\ - 2x = 24 \times ( - 1) \\ 2x = - 24 \\ x = \frac{ - 24}{2} \\ x = - 12$