1. х+1/7x=56
8/7x=56
x=56:8/7
x=56*7/8
x=49
2/ 1-(2/5+1/3)=1-(6/15+5/15)=1-11/15=4/15 xчасть осталось продать
80:4/15=80*15/4=300
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1. х+1/7x=56
8/7x=56
x=56:8/7
x=56*7/8
x=49
2/ 1-(2/5+1/3)=1-(6/15+5/15)=1-11/15=4/15 xчасть осталось продать
80:4/15=80*15/4=300