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y in (-oo:+oo)
(7*(y-2))/4 = 2*y-2 // - 2*y-2
(7*(y-2))/4-(2*y)+2 = 0
(7*(y-2))/4-2*y+2 = 0
(7*(y-2))/4+(-2*4*y)/4+(2*4)/4 = 0
7*(y-2)-2*4*y+2*4 = 0
8-y-14 = 0
-y-6 = 0
(-y-6)/4 = 0
(-y-6)/4 = 0 // * 4
-y-6 = 0
-y-6 = 0 // + 6
-y = 6 // * -1
y = -6
y = -6
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