Solve for x
x = \frac{3}{2} = 1\frac{1}{2} = 1.5
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12+3x-x=15
Subtract x from both sides.
12+2x=15
Combine 3x and -x to get 2x.
2x=15-12
Subtract 12 from both sides.
2x=3
Subtract 12 from 15 to get 3.
x=\frac{3}{2}
Divide both sides by 2.
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