15 + x = -7
First, subtract 15 from both sides. / Your problem should look like:
Second, subtract -7 - 15 to get -22. / Your problem should look like:

Answer:
x = -22 (D)
Answer:
Y=-5/3x-1
y=2/3x-8
If you are adding then it is:
7x=21
x=3
Step-by-step explanation:
5x+3y=-3
3y=-5x-3
y=-5/3-1
2x-3y=24
-3y=-2x+24
y=2/3x-8