Question

упростите выражение 1)5a-3b-8a+12b 2)16c+(3c-2)-(5c+7) 3)7-3(6y-4)

Answer 1

1) 5a - 3b - 8a + 12b = - 3a + 9 = - 3( a - 3)
2) 16c + 3c - 2 - 5c - 7 = 19c - 5c - 9 = 14c - 9
3) 7 - 18y + 12 = 19 - 18y