1. <span>(68,37-y) : 6,15=8,2
</span> 68,37-у = 8,2*6,15
68,37-у=50,43
-у=50,43-68,37
-у= -17,94
Ответ: -17,94
______________
2)
2/11 * (14 1/3 + 2 1/6) = 2/11 * ( 43/3 + 13/6) = 2/11 * ( 43*2 + 13 ) = 2/11 * 99/6
6
= 2/11 * 33/2 =<span> 2*33</span> = 3
11*2