-5у-28у+16у-17у=-34у
1,8b-c+b-4.3c=2.8b-5.3c
2.3a+1.8-3.2a-2.4=-0.9a-0.6
2.9c-4.7d+4.3-3.4c+3.1d=-0.5c-1.6d+4.3
-5у-28у+16у-17у=-34у
1,8b-c+b-4.3c=2.8b-5.3c
2.3a+1.8-3.2a-2.4=-0.9a-0.6
2.9c-4.7d+4.3-3.4c+3.1d=-0.5c-1.6d+4.3