What is the answer to 3/b = 4/5 ?

The answer to 3/b = 4/5 is b= 15/4

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3/b = 4/5

\frac{3}{b} = \frac{4}{5}

b = \frac{15}{4}

Decimal Notation

b = 3.75

Solution steps

\frac{3}{b} = \frac{4}{5}

Cross multiply

15 = b \cdot 4

Switch sides

b \cdot 4 = 15

Divide both sides by

4

b = \frac{15}{4}

Verify Solutions

Find undefined (singularity) points:

b = 0

Combine undefined points with solutions:

b = \frac{15}{4}

5 x = 10 - \frac{1}{x}

0.02572 = \frac{1}{( 19.1 + 1.5 + x )}

\frac{x + 5}{x} = \frac{x + 2}{x - 2}

0 = \frac{x ^{2} - 1}{x ^{3} - 2 x ^{2}}

0.24 = \frac{21}{x}