Question

The sum of two numbers is 8 and their difference is 4. Find the numbers.

Answer 1

Let the numbers be $x$ and $y$

Given $x+y=8$ ___ (i)

$x-y=4$___ (ii)

Adding (i) & (ii)

$2x=12$

$x=6$

Substituting $x$ in (i), we get

$y=2$