How do you solve g = y-c+x for x

To solve for x just isolate x by moving the other variables so ...:

First add c to both sides

g+c = y+x

Subtract y from both sides

g+c-y = x

That should be your final answer (we cannot come up with an actual digit for x because there are no numbers in this equation we simply can make an equation for x)

You would subtract y and add c to both sides and you'll get x=g-y+c