Question

How do you solve x+2y=13 and y=7-x?

Answer 1

`x=1`
`y=6`

Explanation:

= `x+2(7-x)=13`

= `x+14-2x=13`

= `-x=-1`

= `x=1`

Now for y

`y=7-1`

= `y=6`