Question

Упростите выражения
-7b-7+(b+7)
7b+3(b-1)
b-4+5b-7
(2b-4)-(3b-9)
4b-2(b+3)

Answer 1

-7b-7+(b+7)=-7b-7+b+7=-6b
7b+3(b-1)=7b+3b-3=4b-3
b-4+5b-7=6b-11
(2b-4)-(3b-9)=2b-4-3b+9=5-b
4b-2(b+3)=4b-2b-6=2b-6