Solve for x
x=10
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x+42-\left(15+12\right)=25
Add 21 and 21 to get 42.
x+42-27=25
Add 15 and 12 to get 27.
x+15=25
Subtract 27 from 42 to get 15.
x=25-15
Subtract 15 from both sides.
x=10
Subtract 15 from 25 to get 10.
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