Tentukan nilai variabel dari persamaan berikut: a. -6x-5=3x+15 B. 3(4a-5)=4(a+2)

#a
-6x - 5 = 3x + 15
-5 - 15 = 3x + 6x
-5 + (-15) = 9x
-20 = 9x
x = (-20) ÷ 9
x = -2,222

#b
3(4a - 5) = 4(a + 2)
12a - 15 = 4a + 8
12a - 4a = 8 + 15
8a = 23
a = 2,875