1/2 = 4/x

Solution

\frac{1}{2} = \frac{4}{x}

x = 8

Solution steps

\frac{1}{2} = \frac{4}{x}

Cross multiply

x = 8

Verify Solutions

Find undefined (singularity) points:

x = 0

Combine undefined points with solutions:

x = 8

- \frac{4 x}{( x ^{2} - 1 ) ^{2}} = 0

\frac{12}{15} = \frac{26}{x}

\frac{3}{x} = 1

\frac{5}{x - 3} = \frac{3}{5 - x}

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