Question

quanto e a-3a + 5a = 12 =

Answer 1

a -3a + 5a = 12

-2a  + 5a = 12

3a = 12

a = 4

Answer 2

Resposta 4
$a - 3a + 5a = 12 \\ - 2a + 5a = 12 \\ 3a = 12 \\ a = \frac{12}{3} \\ a = 4$