Answer:
a=-1/13c
Step-by-step explanation:
5a+8a=-c
13a=-c
See below
Solve x-5y=6 for x
First, we need to isolate the x by moving -5y to the other side.
To do this, we need to add 5y to both sides
x - 5y= 6
+5y +5y
x= 5y+6
So, your third answer is correct