20 sum-points please help thanks

Y = x-4
-4x +3y = -3
Replace y in the second equation with the first equation:
-4x +3(x-4) = -3
Simplify:
-4x + 3x-12 = -3
Combine like terms:
-x -12 = -3
Add 12 to each side:
-x = 9
Divide both sides by -1:
x = -9
Since -9 is only in one answer choice, the answer is (-9, -13)
Answer:
(-9,-13)
Step-by-step explanation:
y = x-4
-4x+3y = -3
Substitute y =x-4 into the second equation
-4x +3(x-4)= -3
Distribute
-4x+3x-12 = -3
Combine like terms
-x -12 = -3
Add 12 to each side
-x -12+12 = -3+12
-x = 9
Multiply by -1
-1*-x = 9*-1
x=-9
Now we need to find y
y= x-4
y = -9-4
y=-13