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nikolyasobolev
@nikolyasobolev
July 2022
1
8
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Дам 30 баллов кто решит все это )))
Решить уравнение с помощью пропорций
а) x/0,8=3/4-ых / 0,15
б) 5/6-ых /x=4/9ых/4/5-ых
в)5 целых 3/8-ых/ x=6 целых 1/9-ая/ 1 целую 12/44-их
г) (x-0,4)/ 13/21-ых= 4 целых 1 /5-ая /1 целую 9/17-ых
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Answers & Comments
dimasmail281
1) -12х-11х=3-3 2) 0,5у-0,6у=0,7-1,4-23х=0 0,1у=0,7х=0 у=7 3) -3х+7х=4-16
а)х/0,8=3/4:0,15
Х=(3/4•0,8):0,15=(3•0,8)/(4•0,15)=3•0,8/0,6=3•8/6=4
б)5/6/х=4/9/4/5
4/9 х=5/6•4/5
Х=5/6•4/5:4/9
Х=5/6•4/5•9/4=5•4•9/6•5•4=3/2=1,5
в)5 3/8/х=6 1/9/1 12/43
6 1/9•х=5 3/8•1 12/43
55/9•х=43/8•55/43
Х=43/8•55/43•9/55=9/8=1 1/8
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Answers & Comments
а)х/0,8=3/4:0,15
Х=(3/4•0,8):0,15=(3•0,8)/(4•0,15)=3•0,8/0,6=3•8/6=4
б)5/6/х=4/9/4/5
4/9 х=5/6•4/5
Х=5/6•4/5:4/9
Х=5/6•4/5•9/4=5•4•9/6•5•4=3/2=1,5
в)5 3/8/х=6 1/9/1 12/43
6 1/9•х=5 3/8•1 12/43
55/9•х=43/8•55/43
Х=43/8•55/43•9/55=9/8=1 1/8