Question

If sum of two numbers is $15$ and their difference is $7$ then find the numbers.

Answer 1

Given sum of two numbers is $15$ and their difference is $7$.

Let the numbers be $a,b$.

Then according to the problem,

$a+b=15$ and $a-b=7$.

Solving from the above equations we get $a=\frac{15+7}{2}=11$ and $b=\frac{15-7}{2}=4$.