Answer:
y = -3 and x = 4
Step-by-step explanation:
4x + 3y = 7
x = y + 7
Since we know what x is equal, replace the x in the first equation with the second equation.
4x + 3y = 7
4(y + 7) + 3y = 7
4y + 28 + 3y = 7
7y + 28 = 7
7y = 7 - 28
7y = -21
y = -3
Now that we know y, you can use the same process to find x.
x = y + 7
x = (-3) + 7
x = 4
