1) -6ac - 8a + 6ac = -8a2) 5a - 10c + 5 - (-12 + 12ac) = 5a - 10c + 5 + 12 - 12ac = 5a - 10c + 17 - 12ac3) -2xy - 7x + 7x - 28xy = -2xy - 28xy = -30xy
1) -6ac - 8a + 6ac = -8a
2) 5a - 10c + 5 - (-12 + 12ac) = 5a - 10c + 5 + 12 - 12ac = 5a - 10c + 17 - 12ac
3) -2xy - 7x + 7x - 28xy = -2xy - 28xy = -30xy