What is the answer to 1/15+1/21 = 1/x ?

The answer to 1/15+1/21 = 1/x is x= 35/4

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1/15+1/21 = 1/x

\frac{1}{15} + \frac{1}{21} = \frac{1}{x}

x = \frac{35}{4}

Decimal Notation

x = 8.75

Solution steps

\frac{1}{15} + \frac{1}{21} = \frac{1}{x}

Multiply both sides by

x

\frac{4}{35} x = 1

Multiply both sides by

35

4 x = 35

Divide both sides by

4

x = \frac{35}{4}

Verify Solutions

Find undefined (singularity) points:

x = 0

Combine undefined points with solutions:

x = \frac{35}{4}

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

\frac{8}{x} - x = 4

\frac{3}{n} - \frac{1}{2} = \frac{n - 5}{n}

x + \frac{6}{x} = 18

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

What is the answer to 1/15+1/21 = 1/x ?
The answer to 1/15+1/21 = 1/x is x= 35/4
Solve for x: 1/15+1/21 = 1/x
The solution is x= 35/4