Solve for x
x=13
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520=40x
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x.
40x=520
Swap sides so that all variable terms are on the left hand side.
x=\frac{520}{40}
Divide both sides by 40.
x=13
Divide 520 by 40 to get 13.
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