What is the answer to 1/6 x+21= 2/5 x ?

The answer to 1/6 x+21= 2/5 x is x=90

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1/6 x+21= 2/5 x

\frac{1}{6} x + 21 = \frac{2}{5} x

x = 90

Solution steps

\frac{1}{6} x + 21 = \frac{2}{5} x

Move

21

to the right side

\frac{1}{6} x = \frac{2}{5} x - 21

Move

\frac{2}{5} x

to the left side

- \frac{7}{30} x = - 21

Multiply both sides by

30

- 7 x = - 630

Divide both sides by

- 7

x = 90

9 x = 7 x + 24

\frac{7}{9} (3 x - \frac{9}{14}) - x = 7 (\frac{x}{7} - \frac{1}{14}) + x + 1

2 x + \frac{x + 7}{5} = 8

\frac{x + a}{2} - 6 + \frac{a - x}{5} = \frac{7 a}{10}

47 \cdot 0.3 + 77 \cdot 0.1 + 0.6 \cdot x = 65