To solve it using substitution, you need to plug in one of the equations for y on the other. Since they both equal y, that means the equations also equal each other.
It would be:
3x - 17 = -2x + 8
Then solve. First you can add 2x to both sides.
5x - 17 = 8
Add 17 to both sides
5x = 35
Divide both sides by 5.
x = 5
Since we now have x, we can find y by plugging in 5 for x in any of the equations. I will use y = -2x + 8
y = -2(5) + 8
y = -10 + 8
y = -2
We now have both x and y. As a coordinate point, it would be (5, -2).
