Question

How do you solve the system y=x+1 and x+y=9?

Answer 1

Substitute for y in the second equation to get a value for x, and then solve for y

Explanation:

`y = x +1`
Therefore `x + (x+1) = 9`
`2x = 9 -1`
`2x = 8`
`x = 4`
`y = 4 + 1`
`y = 5`