Question

if we add 30% of A to 210 the result is A again. Find A.​

Answer 1

Answer:

$a = 300$

A = 300

Step-by-step explanation:

$30 \: percent \: of \: a \: + \: 210 \: = \: a \\ \\ \\ \\ then \: \: \: 210 = a - a \times \frac{30}{100} \\ \\ 210 = a( \frac{70}{100} ) \\ \\ a = \frac{210 \times 100}{70} \\ \\ a = 300$