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y in (-oo:+oo)
(10*y-12)/4 = (4-(2*y))/6 // - (4-(2*y))/6
(10*y-12)/4-((4-(2*y))/6) = 0
(10*y-12)/4-((4-2*y)/6) = 0
(10*y-12)/4+(-1*(4-2*y))/6 = 0
(6*(10*y-12))/(4*6)+(-1*4*(4-2*y))/(4*6) = 0
6*(10*y-12)-1*4*(4-2*y) = 0
68*y-88 = 0
(68*y-88)/(4*6) = 0
(68*y-88)/(4*6) = 0 // * 4*6
68*y-88 = 0
68*y-88 = 0 // + 88
68*y = 88 // : 68
y = 88/68
y = 22/17
y = 22/17
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