Question

упростите выражение 6+5а-5а+4а-6а=
4(а-3)-7(а+2)-3(2а-9)=

Answer 1

6 + 5a - 5a + 4a - 6a = 6 + (5-5+4-6)a = 6 + (-2)a = 6 - 2a

4a - 12 - 7a - 14 - 6a + 27 = (4-7-6)a + (27-12-14) = -9a + 1