<span>6(3+5у)-(2+7у)≤5(4+3у)
18+30у-2-7у</span>≤20+15у
23у-15у≤20-16
8у≤4
у≤1/2
(-∞;1/2]
2 1/6 и 3 1/9 = 2 3/18 u 3 2/18
4 2/7 и 5 4/21 = 4 6/21 u 5 4/21
1 3/11 и 2 1/2 = 1 6/22 u 2 11/22
2 8/15 и 1 5/12 = 2 32/60 u 1 25/60
=0,05*10*0,2*2,3=0,5*0,46=0,23