What is the answer to 3/z = 9/12 ?

The answer to 3/z = 9/12 is z=4

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3/z = 9/12

\frac{3}{z} = \frac{9}{12}

z = 4

Solution steps

\frac{3}{z} = \frac{9}{12}

Cross multiply

36 = z \cdot 9

Switch sides

z \cdot 9 = 36

Divide both sides by

9

z = 4

Verify Solutions

Find undefined (singularity) points:

z = 0

Combine undefined points with solutions:

z = 4

7 - \frac{1}{t} = \frac{6}{t ^{2}}

\frac{x + 2}{x + 1} = \frac{3}{5}

2 x = \frac{3 x ^{2} - 16}{x}

\frac{1}{x - 3} = - \frac{1}{x + 2}

\frac{x + 3}{x + 5} = \frac{4}{x}