Solve for x
x=5
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3x-15=0
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x^{2}.
3x=15
Add 15 to both sides. Anything plus zero gives itself.
x=\frac{15}{3}
Divide both sides by 3.
x=5
Divide 15 by 3 to get 5.
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