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