Ответы и объяснения

2014-02-28T10:34:46+00:00
0.2t+1.7t-0.54=0.22
1.9t = 0.22+0.54
1.9t= 0.76
t= 0.76/1.9
t=0.4 jndtn

5.6z-2z-0.7z+2.65=7
2.9z=7-2.65
2.9z= 4.35
z= 4.35/2.9
z= 1.5 ответ
2014-02-28T10:34:56+00:00