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3x+18-3=2x-15
Multiply both sides of the equation by 3.
3x+15=2x-15
Subtract 3 from 18 to get 15.
3x+15-2x=-15
Subtract 2x from both sides.
x+15=-15
Combine 3x and -2x to get x.
x=-15-15
Subtract 15 from both sides.
x=-30
Subtract 15 from -15 to get -30.