Answer:
y=-3 x=4
Step-by-step explanation:
y=3x+3
y=3x+3 y=x-1
+1 +1
y+1=x
y=3(y+1)+3
y=3y+3+3
y=3y+6
-3y=-3y
-2y=6
-y=3
y=-3
3=x-1
+1=+1
4=x
