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y in (-oo:+oo)
5*(-((3/4)*y)-5) = -65/2 // + -65/2
5*(-((3/4)*y)-5)-(-65/2) = 0
5*((-3/4)*y-5)+65/2 = 0
5*(-3/4*y-5)+65/2 = 0
(2*5*(-3/4*y-5))/2+65/2 = 0
2*5*(-3/4*y-5)+65 = 0
15-15/2*y = 0
(15-15/2*y)/2 = 0
(15-15/2*y)/2 = 0 // * 2
15-15/2*y = 0
15-15/2*y = 0 // - 15
-15/2*y = -15 // : -15/2
y = -15/(-15/2)
y = 2
y = 2
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