1)0.3m+2(0.2m-0.3)=0.8-0.7(m-2)
0.3m+0.4m-0.6=0.8-0.7m-1.4
0.7m-0.6=-0.6-0.7m
0.7m-0.7m=0.6-0.6
0=0
2)0.6-(1.3+1)=2.8x-13.52
0.6-2.3=2.8x-13.52
2.8x-13.52+1.7
2.8x=15.22
x=15.22/2.8
x=5.43571
1)1000ч+695ч-456ч=1239
2305ч+695ч-456ч=2544
2)56800кг-2720-3680кг=50400
56800кг-2720-10026кг=44054
(3,17+0,77:1,4)*3,5-5-4,216 = 3,804