
***I switched the order of c/7 and -5. It means the same thing, but I just find it easier this way
To solve for c you must isolate this by bringing 7 to the other side. To do this you must multiply 7 to both sides. This will cancel 7 from the left side (the right side in the way the equation is written in the question) and bring it over to the right side

c = -35
Hope this helped!
~Just a girl in love with Shawn Mendes