Solve for x
x = \frac{20}{3} = 6\frac{2}{3} \approx 6.666666667
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x\times 4-1\times 20=x
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x.
x\times 4-20=x
Multiply 1 and 20 to get 20.
x\times 4-20-x=0
Subtract x from both sides.
3x-20=0
Combine x\times 4 and -x to get 3x.
3x=20
Add 20 to both sides. Anything plus zero gives itself.
x=\frac{20}{3}
Divide both sides by 3.
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