A.)3x-3=12. B.)x+3=2x-8. C.)6x-5=2x+17. D.)3(2x-1)=5(x-1) bagaimana cara kerja variabel 1

a)
3x-3 = 12
3x = 12+3
3x = 15
x = 15:3
x = 5

b)
x+3 = 2x-8
x-2x = -8-3
-x = -11
x = 11

c)
6x-5 = 2x+17
6x-2x = 17+5
4x = 22
x = 22/4
x = 5 2/4
x = 5 1/2

d)
3(2x-1) = 5(x-1)
3.2x + 3.(-1) = 5.x + 5.(-1)
6x-3 = 5x-5
6x-5x = -5+3
x = -2