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(7*(2*y-1))/5 = 5*y-8 // - 5*y-8
(7*(2*y-1))/5-(5*y)+8 = 0
(7*(2*y-1))/5-5*y+8 = 0
(7*(2*y-1))/5+(-5*5*y)/5+(5*8)/5 = 0
7*(2*y-1)-5*5*y+5*8 = 0
40-11*y-7 = 0
33-11*y = 0
(33-11*y)/5 = 0
(33-11*y)/5 = 0 // * 5
33-11*y = 0
33-11*y = 0 // - 33
-11*y = -33 // : -11
y = -33/(-11)
y = 3
y = 3
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