2целых1/2y-1,27=3/4y-4,77
2 1/2у-1.27=3/4у-4.77 5/2у-1.27=3/4у-4.77 5/2у-3/4у=-4.77+1.27 1.75у=-3.5 у=-2
2,5y - 1,27 = 0,75y - 4,77 2,5y - 0,75y = -4,77 + 1,27 1,75y = -3,5 Y = -2