Question

Упростите выражения А)8c -2d -11c+7d Б)12b+(7b-3)-(8b+6) В)3-4(5а-6)

Answer 1

А)8c -2d -11c+7d=-3с+5d;//// Б)12b+(7b-3)-(8b+6)=12b+7b-3-8b-6= 11b-9;//// В)3-4(5а-6)=3-20a+24=-20a+27

Answer 2

А) 8c - 2d - 11c + 7d = -3c + 5d

Б) 12b + (7b - 3) - (8b + 6) = 12b + 7b - 3 - 8b - 6 = 11b - 9

В) 3 - 4(5a - 6) = 3 - 20a + 24 = -20a + 27