Question

if 1 by 3 of a number exceeds its 2 by 7 by 1 find the number

Answer 1

Let the number be x.
$\frac{x}{3} = \frac{2x}{7} + 1 \\ \frac{x}{3} - \frac{2x}{7} \\ \frac{7x - 6x}{21} = 1 \\ x = 21$
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