Solve for x
x=18
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90=5x
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x.
5x=90
Swap sides so that all variable terms are on the left hand side.
x=\frac{90}{5}
Divide both sides by 5.
x=18
Divide 90 by 5 to get 18.
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