18=3(2x-6)
Multiply the bracket by 3
18=3(2x)(3)(-6)
18=6x-18
Move -18 to the other side. Sign changes from -18 to +18.
18+18=6x-18+18
18+18=6x
36=6x
Divide by 6 for both sides.
36/6=6x/6
x=6
Answer: x=6
