Question

Find the value of ' a ' in a/15 = (a+3)/20 ​

Answer 1

Step-by-step explanation:

$\frac{a}{15} = \frac{(a + 3)}{20} \\ 20a = 15(a + 3) \\ 20a = 15a + 45 \\ 20a - 15a = 45 \\ 5a = 45 \\ a = \frac{45}{5} \\ a = 9$

Answer 2

Answer:

a=9

Step-by-step explanation:

a/15 = (a+3)/20

Using cross multiplication, (a*20) = [(a+3)*15)] we get, (20a = 15a*45).

Then subtracting, (20a - 15a), we have 5a=45 left.

Dividing 5 by 5, and 45 by 5; we get:     (a = 9)