Question

Упростите выражение 1)79-(20+9а)+(11а-122)=
2)-(b+40)+(28-19b)+11b=


Срочно помогите!!!!

Answer 1

1)79-(20+9а)+(11а-122)=79-20-9а+11а-122=
=2а-63
2)-(b+40)+(28-19b)+11b= -b-40+28-19b+11b=
= -9b-12