Answer:
x = 2
y = -1
Step-by-step explanation:
Since it gives you the value of y already, just plug that into the equation, like so:
y = 4x - 9
x - 3 = 4x - 9
Subtract the x from both sides:
x - 3 = 4x - 9
-x - x
__________
-3 = 3x - 9
Then, add 9 to both sides:
-3 = 3x - 9
+9 + 9
________
6 = 3x
Divide both sides by 3:
2 = x
Now plug in x for y:
y = x - 3
y = 2 - 3
y = -1
