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8x-13-3x=7
Subtract 3x from both sides.
5x-13=7
Combine 8x and -3x to get 5x.
5x=7+13
Add 13 to both sides.
5x=20
Add 7 and 13 to get 20.
x=\frac{20}{5}
Divide both sides by 5.
x=4
Divide 20 by 5 to get 4.