Solve for x
x=5
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3x+75=90
Swap sides so that all variable terms are on the left hand side.
3x=90-75
Subtract 75 from both sides.
3x=15
Subtract 75 from 90 to get 15.
x=\frac{15}{3}
Divide both sides by 3.
x=5
Divide 15 by 3 to get 5.
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