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(7-(2*x))/4-8 = -3 // + 3
(7-(2*x))/4-8+3 = 0
(7-2*x)/4-8+3 = 0
(7-2*x)/4+(-8*4)/4+(3*4)/4 = 0
3*4-2*x-8*4+7 = 0
12-2*x-25 = 0
-2*x-13 = 0
(-2*x-13)/4 = 0
(-2*x-13)/4 = 0 // * 4
-2*x-13 = 0
-2*x-13 = 0 // + 13
-2*x = 13 // : -2
x = 13/(-2)
x = -13/2
x = -13/2
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