Solve for x
x=5
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20\times 4=x\times 16
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 x,20.
80=x\times 16
Multiply 20 and 4 to get 80.
x\times 16=80
Swap sides so that all variable terms are on the left hand side.
x=\frac{80}{16}
Divide both sides by 16.
x=5
Divide 80 by 16 to get 5.
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