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y in (-oo:+oo)
7-((1/2)*(5*y-3)) = 10-((4/5)*(3-(4*y))) // - 10-((4/5)*(3-(4*y)))
(4/5)*(3-(4*y))-((1/2)*(5*y-3))-10+7 = 0
(-1/2)*(5*y-3)+(4/5)*(3-4*y)-10+7 = 0
4/5*(3-4*y)-1/2*(5*y-3)-10+7 = 0
4/5*(3-4*y)-1/2*(5*y-3)-10+7 = 0
39/10-57/10*y-10+7 = 0
7-57/10*y-61/10 = 0
9/10-57/10*y = 0
9/10-57/10*y = 0
9/10-57/10*y = 0 // - 9/10
-57/10*y = -9/10 // : -57/10
y = -9/10/(-57/10)
y = 3/19
y = 3/19
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