Question 845274
In this problem it looks like they want you to solve for c. 

68 + 2c = 180.

First we need to simplify and isolate the c term on the left side. We do this by subtracting 68 from both sides. 

68 (-68) + 2c = 180 (-68) 

0 + 2c = 112

2c = 112

Now to solve for c we simply divide each side by 2 

2c/2 = 112/2

The 2's divide out and we are left with 

c = 56. 

Now, let's check our solutions by plugging it back into the original equation.


68 + 2(56) = 180

68 + 112 = 180

180 = 180. It checks out so c = 56 is the correct answer.