Tolong jawab soal no 6 dan 7 dengan cara ya kak, trimakasih

Semoga membantu ya...

6. 1/2 (a+4) = 1/3 (a -12)
6x 1/2 (a+4) = 6 x 1/3 (a-12)
3 (a + 4) = 2 (a -12)
3a + 12 = 2a -24
3a - 2a = -24 -12
a = -36

Hp = {-16}

7. 2/5 (b + 10) = b - 14
5 x 2/5 (b +10) = 5(b-14)
2(b + 10) = 5 ( b -14)
2b + 20 = 5b - 70
20 +70 = 5b -2b
90 = 3b
b = 90/3
b = 30

Hp = { 30 }