What is the answer to 4/x = 5/7 ?

The answer to 4/x = 5/7 is x= 28/5

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4/x = 5/7

\frac{4}{x} = \frac{5}{7}

x = \frac{28}{5}

Decimal Notation

x = 5.6

Solution steps

\frac{4}{x} = \frac{5}{7}

Cross multiply

28 = x \cdot 5

Switch sides

x \cdot 5 = 28

Divide both sides by

5

x = \frac{28}{5}

Verify Solutions

Find undefined (singularity) points:

x = 0

Combine undefined points with solutions:

x = \frac{28}{5}

a, t = \frac{G}{a} + h

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

56 x - 15 = \frac{56}{x}

y, x = \frac{y + 1}{y - 3}

y, x = \frac{y + 1}{y - 1}