Упростите выражение 1. 9-2(-c+4) 2. 4x-(3x+(2x-1)) 3. y-3(2-y)+8 4. 2(x-y)-(x+y) 6. y-(2y-(3y-4))

1. 9+2с-8=1+2с2.4х-(3х+2х-1)=4х-3х-2х+1=-х+13.у-6+3у+8=4у+24.2х-2у-х-у=х+3у6.у-(2у-3у+4)=у-2у+3у-4=2у-4