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(4*y-2)/5-((y+4)/5) = -3 // + 3
(4*y-2)/5-((y+4)/5)+3 = 0
(4*y-2)/5+(-1*(y+4))/5+3 = 0
(4*y-2)/5+(-1*(y+4))/5+(3*5)/5 = 0
4*y-1*(y+4)+3*5-2 = 0
3*y-6+15 = 0
3*y+9 = 0
(3*y+9)/5 = 0
(3*y+9)/5 = 0 // * 5
3*y+9 = 0
3*y+9 = 0 // - 9
3*y = -9 // : 3
y = -9/3
y = -3
y = -3
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