Question

The sum of two numbers is 30, while their difference is 6. Find the two numbers.

(Its, not 12 or 18)

Answer 1

• Let it be x and y

`\\ \tt\hookrightarrow x+y=30\dots(1)`

`\\ \tt\hookrightarrow x-y=6\dots(2)`

Now

Add both equations

`\\ \tt\hookrightarrow 2x=36\implies x=18`

Put in eq(2)

`\\ \tt\hookrightarrow 18-y=6\implies y=12`