(42)/x =7

Solution

\frac{42}{x} = 7

x = 6

Solution steps

\frac{42}{x} = 7

Multiply both sides by

x

42 = 7 x

Switch sides

7 x = 42

Divide both sides by

7

x = 6

Verify Solutions

Find undefined (singularity) points:

x = 0

Combine undefined points with solutions:

x = 6

\frac{4}{x + 2} = \frac{9}{3 x}

1 = \frac{2}{r ^{2}} - \frac{1}{r}

\frac{15}{70} = \frac{30}{x}

\frac{2 x}{6} = \frac{x - 2}{3 x}

x, \frac{a x + b}{c x + d} = 8