(6-1/2)-(3-X/3)=7-(2X-X/2)
(5/2)-(3-X/3)=7-(X/2)
(15-3-X/6)=(14-X/2)
2(12-X)=(14-X)6
24-2X=84-6X
24-84=2X-6X
-60=-4X
60/4=X
15=X
