1) x - 2y - 3x + 5y = x - 3x - 2y +5y = -2x +3y
2) 8,7 - 2m +n -1/3m + 2/3n = 8,7 - 2m - 1/3m +n + 2/3n = 8,7 - 2, 1/3m + 1, 2/3n
3)0,48b + 3 + 0,52b - 3,7b = 3 + 0,48b + 0,52b - 3,7b = 3 - 2,7b
4)5/6y - 1/3b - 1/6y + 2/3b - 3 = -3 + 5/6y - 1/6y - 1/3b + 2/3b = -3 + 4/6y + 1/3b
5)5,7p - 2,7q + 0,3p + 0,8q + 1,9q - p = 5,7p +0,3p - p - 2,7q +0,8q +1,9q= 5p