Question

4 (a+12)-2(a-20)=2(a+10)+3 (a+8)​

Answer 1

$4(a + 12) - 2(a - 20) = 2(a + 10) + 3(a + 8) \\ 4a + 48 - 2a + 40 = 2a + 20 + 3a + 24 \\ 2a + 88 = 5a + 44 \\ 2a - 5a = 44 - 88 \\ - 3a = - 44 \: ^{ \times ( - 1)} \\ 3a = 44 \\ a = \frac{44}{3} \\ a = 14.6$

Espero ter ajudado!! ^_^