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madina2484
@madina2484
July 2022
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Решите уравнение: 3/7 : к = 5 : 2 1/3; 2) к : 5/9 = 1,8 : 6; 3) 5,5 : 8 = к : 2/11; 4) 20 : 3,25 = 4/13 : к. Найдите у из пропорций; 1) 11у/20 = 16 : 80; 2) 5,1 : 8,7 = 34у/29; 3) 7,2 : 2,7 = 32у/3
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gal4enok007
1) 5k=3/7•21/3
5k=3/7•7/3
5k=1
k=1/5
2) 6k=5/9•1.8
6k=5/9•9/5
6k=1
k=1/6
3) 8k=5.5•2/11
8k=11/2•2/11
8k=1
k=1/8
4) 20k=4/13•3,25
20k=4/13•13/4
20k=1
k=1/20
880y=320
y=320/880=32/88=4/11
7,2•3=32•2.7y
21,6=86,4y
y=1/4
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Answers & Comments
5k=3/7•7/3
5k=1
k=1/5
2) 6k=5/9•1.8
6k=5/9•9/5
6k=1
k=1/6
3) 8k=5.5•2/11
8k=11/2•2/11
8k=1
k=1/8
4) 20k=4/13•3,25
20k=4/13•13/4
20k=1
k=1/20
880y=320
y=320/880=32/88=4/11
7,2•3=32•2.7y
21,6=86,4y
y=1/4