1)(3у-15)×(21/5+7/10у)=0
3у-15=0
21/5+7/10у=0
у1=5
у2=-6
2)6х-(2х+3)=4х-3
6х-2х-3=4х-3
6х-2х=4х
4х=4х
1)(3у-15)×(21/5+7/10у)=0
3у-15=0
21/5+7/10у=0
у1=5
у2=-6
2)6х-(2х+3)=4х-3
6х-2х-3=4х-3
6х-2х=4х
4х=4х