Ответы и объяснения

2013-02-03T15:40:21+04:00

2x - 3 - (5x - 4) = 2x - 3 - 5x + 4 = 1 - 3x
3х - 5 - (7х - 3) = 3x - 5 - 7x + 3 = -4x -2
5х - 6 - (8х-7) = 5x - 6 - 8x + 7 = -3x +1
4х - 7 - (6х - 8) = 4x - 7 - 6x + 8 = 1 - 2x