а) -3m + 19m - 15m - (-6m) = -3m + 19m - 15m + 6m = 7m
б) x + 0.65x - 2.75 + (-0.65x) - x = x + 0.65x - 0.65x - x - 2.75 = 0 - 2.75 = -2.75
а) -3m + 19m - 15m - (-6m) = -3m + 19m - 15m + 6m = 7m
б) x + 0.65x - 2.75 + (-0.65x) - x = x + 0.65x - 0.65x - x - 2.75 = 0 - 2.75 = -2.75