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(1/7)*(3*x+12)-((1/2)*(x+4)) = 2 // - 2
(1/7)*(3*x+12)-((1/2)*(x+4))-2 = 0
(1/7)*(3*x+12)+(-1/2)*(x+4)-2 = 0
1/7*(3*x+12)-1/2*(x+4)-2 = 0
1/7*(3*x+12)-1/2*(x+4)-2 = 0
-1/14*x-2-2/7 = 0
-1/14*x-16/7 = 0
-1/14*x-16/7 = 0
-1/14*x-16/7 = 0 // + 16/7
-1/14*x = 16/7 // : -1/14
x = 16/7/(-1/14)
x = -32
x = -32
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