Solve for x
x=75
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x\times 4=20\times 15
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by 20x, the least common multiple of 20,x.
x\times 4=300
Multiply 20 and 15 to get 300.
x=\frac{300}{4}
Divide both sides by 4.
x=75
Divide 300 by 4 to get 75.
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