Ответы и объяснения

2014-04-14T14:37:13+00:00
(19.3+3.3y)*0.16=7.312
3,088+0,528y=7.312
0.528y=4.224
y=8

0.8*(15y-9.7y)=127.2
12y-7.76y=127.2
4.24y=127.2
y=30


2014-04-14T15:08:03+00:00
(19.3+3.3y)*0.16=7.312
3,088+0,528y=7.312
0.528y=4.224
y=8

0.8*(15y-9.7y)=127.2
12y-7.76y=127.2
4.24y=127.2
y=30