Solve for x
x=4
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1+4x-x=13
Subtract x from both sides.
1+3x=13
Combine 4x and -x to get 3x.
3x=13-1
Subtract 1 from both sides.
3x=12
Subtract 1 from 13 to get 12.
x=\frac{12}{3}
Divide both sides by 3.
x=4
Divide 12 by 3 to get 4.
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