Answer:
(x, y) = (2, -1)
Step-by-step explanation:
You want to solve this system using substitution.
Substitution
It works best to substitute for a variable that you already have an expression for. Here, you have two expressions for y. Substituting both for y, you get ...
y = y
4x -9 = x -3
3x = 6 . . . . . . . . add 9-x to both sides
x = 2 . . . . . . . . divide by 3
y = 2 -3 = -1 . . . . substitute for x in the second equation
The solution is (x, y) = (2, -1).
