Solve for x
x=9
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90+10x=180
Combine 7x and 3x to get 10x.
10x=180-90
Subtract 90 from both sides.
10x=90
Subtract 90 from 180 to get 90.
x=\frac{90}{10}
Divide both sides by 10.
x=9
Divide 90 by 10 to get 9.
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