Solve for c.

8 = 4 + 2c

c =

8 = 4 + 2c

move 4 to the other side

the sign always changes when moving to the other side

8-4 = 4-4+2c

8-4 = 2c

4 = 2c

divide both sides by 2 to get c by itself

4/2 = 2c/2

Cross out 2 and 2 divide by 2 and then becomes 1*1*c = c

c = 4/2

Answer: c = 2