Помните ришить:1)4 (2х-0,3у)-2 (3х-0,2у)=...2)-4,5-(6,55-3,5)=...3)-8 (2х+1)+5...

Question

Помните ришить:1)4 (2х-0,3у)-2 (3х-0,2у)=...2)-4,5-(6,55-3,5)=...3)-8 (2х+1)+5 (3х-2)=...4)(х-2)-3 (х+1)=...

Answer 1

1) 4(2х-0.3у)-2(3х-0,2у)=8х-1.2у-6х+0.4у=2х-0.8у
2)-4,5-(6,55-3,5)=-7,55
3) -8(2х+1)+5(3х-2)=-16х-8+15х-10=-х-18
4)(х-2)-3(х+1)=х-2-Зх-3=-2х-5