Question

X+y=90, x-y=32. What is x?

Answer 1

The equations are

`x+y=90`
`x-y=32`

Use elimination:
Add the equations together:

`2x=122`

`x=61`

Substitute `61` back in the equation:

`61+y=90`

`y=29`

The answer is `(61,29)`