Question

Упростите выражение: - 2(4y - 7 - 2b) - (5 - 3y + b)

Answer 1

-8y+14+4b-5+3y-b=-5y+9+3b

Answer 2

$-2(4y-7-2b)-(5-3y+b)=-8y+14+4b-5+3y-b= \\ \\ =-5y+3b+9$