Question

If a+b=20 and a-b=10 then what is value of a/b

Answer 1

Here b=5 and a=15 I would have sent u pic BT my phone camera isn't working .....

Answer 2

Answer:

$\frac{a}{b}=3$

Step-by-step explanation:

I have calculated the required value without finding the values of a and b.

Given equations are

$a+b=20$

$a-b=10$

Divide these equations by b, we get

$\frac{a}{b}+1=\frac{20}{b}$.......(1)

$\frac{a}{b}-1=\frac{10}{b}$.......(2)

(1) can be written as

$\frac{a}{b}+1=2(\frac{10}{b})$

using (2), we get

$\frac{a}{b}+1=2(\frac{a}{b}-1)$

$\frac{a}{b}+1=2\frac{a}{b}-2$

$2+1=2\frac{a}{b}-\frac{a}{b}$

$3=\frac{a}{b}$

That is

$\frac{a}{b}=3$