Solve for x
x=20
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10\times 4=x\times 2
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by 10x, the least common multiple of x,10.
40=x\times 2
Multiply 10 and 4 to get 40.
x\times 2=40
Swap sides so that all variable terms are on the left hand side.
x=\frac{40}{2}
Divide both sides by 2.
x=20
Divide 40 by 2 to get 20.
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