(20)/x =5

Solution

\frac{20}{x} = 5

x = 4

Solution steps

\frac{20}{x} = 5

Multiply both sides by

x

20 = 5 x

Switch sides

5 x = 20

Divide both sides by

5

x = 4

Verify Solutions

Find undefined (singularity) points:

x = 0

Combine undefined points with solutions:

x = 4

\frac{x - 1}{x + 1} = 2

- \frac{1}{x ^{2}} = 0

w + \frac{10}{w} = 6

\frac{2}{7} = \frac{6}{x}

x^{- 1} = 4