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y in (-oo:+oo)
2*y-((3*(10-(2*y)))/4)+(5*y)/2-3 = 6 // - 6
2*y-((3*(10-(2*y)))/4)+(5*y)/2-6-3 = 0
(-3/4)*(10-2*y)+2*y+(5*y)/2-6-3 = 0
2*y-3/4*(10-2*y)+(5*y)/2-6-3 = 0
(-3/4*2*(10-2*y))/2+(2*2*y)/2+(5*y)/2+(-6*2)/2+(-3*2)/2 = 0
2*2*y-3/4*2*(10-2*y)+5*y-6*2-3*2 = 0
7*y+5*y-15-12-6 = 0
12*y-15-12-6 = 0
12*y-27-6 = 0
12*y-33 = 0
(12*y-33)/2 = 0
(12*y-33)/2 = 0 // * 2
12*y-33 = 0
12*y-33 = 0 // + 33
12*y = 33 // : 12
y = 33/12
y = 11/4
y = 11/4
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