Solve for x
x=60
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2\times 40=x+20
Variable x cannot be equal to -20 since division by zero is not defined. Multiply both sides of the equation by 2\left(x+20\right), the least common multiple of 20+x,2.
80=x+20
Multiply 2 and 40 to get 80.
x+20=80
Swap sides so that all variable terms are on the left hand side.
x=80-20
Subtract 20 from both sides.
x=60
Subtract 20 from 80 to get 60.
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