x=3(2x)/x

Solution

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

x = 6

Solution steps

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

Simplify

3 \cdot \frac{2 x}{x} : 6

x = 6

Verify Solutions

Find undefined (singularity) points:

x = 0

Combine undefined points with solutions:

x = 6

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

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

x = \frac{6 x}{x ^{2} + 9}

3.47 = \frac{x}{4200 - x}

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