Solve for x
x=10
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x-12+2x=18
Add 2x to both sides.
3x-12=18
Combine x and 2x to get 3x.
3x=18+12
Add 12 to both sides.
3x=30
Add 18 and 12 to get 30.
x=\frac{30}{3}
Divide both sides by 3.
x=10
Divide 30 by 3 to get 10.
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