Solve for v
v = \frac{20}{3} = 6\frac{2}{3} \approx 6.666666667
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20=v\left(4-1\right)
Variable v cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by 20v, the least common multiple of v,20.
20=v\times 3
Subtract 1 from 4 to get 3.
v\times 3=20
Swap sides so that all variable terms are on the left hand side.
v=\frac{20}{3}
Divide both sides by 3.
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