Solve for x
x=11
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7x+13=90
Combine 4x and 3x to get 7x.
7x=90-13
Subtract 13 from both sides.
7x=77
Subtract 13 from 90 to get 77.
x=\frac{77}{7}
Divide both sides by 7.
x=11
Divide 77 by 7 to get 11.
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