а) 7x - 8 + 5x = 12х-8
б) x - 5 + 3x = 4х-5
в) -7x + 9 + 7x = 9
г) x + 2 - 4x = 2-3х
д) -8x - 7 + 8x =-7
а) 7x - 8 + 5x = 12х-8
б) x - 5 + 3x = 4х-5
в) -7x + 9 + 7x = 9
г) x + 2 - 4x = 2-3х
д) -8x - 7 + 8x =-7