What is the answer to (21)/(2+x)=3 ?

The answer to (21)/(2+x)=3 is x=5

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(21)/(2+x)=3

\frac{21}{2 + x} = 3

x = 5

Solution steps

\frac{21}{2 + x} = 3

Multiply both sides by

2 + x

21 = 3 (2 + x)

Switch sides

3 (2 + x) = 21

Divide both sides by

3

2 + x = 7

Move

2

to the right side

x = 5

Verify Solutions

Find undefined (singularity) points:

x = - 2

Combine undefined points with solutions:

x = 5

\frac{x - 7}{3 x} + 1 = \frac{x + 4}{x}

60 = \frac{5}{12 \cdot 124 + b}

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

\frac{3}{x + 1} + \frac{3 x - 9}{2} = 1

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