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3-2x-6=x-18
Use the distributive property to multiply -2 by x+3.
-3-2x=x-18
Subtract 6 from 3 to get -3.
-3-2x-x=-18
Subtract x from both sides.
-3-3x=-18
Combine -2x and -x to get -3x.
-3x=-18+3
Add 3 to both sides.
-3x=-15
Add -18 and 3 to get -15.
x=\frac{-15}{-3}
Divide both sides by -3.
x=5
Divide -15 by -3 to get 5.