Selesaikan persamaan linear satu variabel dibawah ini 6×+5+(3×+7)=3(-×-2)

9x+12 = -3x-6
9x+3x = -6-12
12x = -18
x = -18/12
x = -3/2

6x + 5 + (3x + 7) = 3 (-x - 2)
6x + 3x + 5 +7 = -3x -6
9x - (-3x) + 12 = -6
12x + 12 = -6
12x = -6 - 12
12x = -18
x = 1.5