Question

Помогите решить умаляю пжл номер 762.751

Answer 1

762:
1) = 3x-21+5x = 8x-21
2) = 5a - 0,7a -8 = 4,3a - 8
3) = 5,3b - 2b - 3 = 3,3b-3
4)9,6b+7 - 0,4b = 9,2b+ 7 
5) =2c-9+5,1c= 7,1c-9
6) = -5c+13-6c = 13-11c