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Amai121
@Amai121
April 2021
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Помогите пожалуйста) номер 142. за раннее спасибо
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битбоксерша
А)7/8у=1 1/4
у=1 1/4:7/8
у=5/4*8/7
у=1 3/7
б)2 1/15-3/4м=59/60
3/4м=2 1/15-59/60
3/4м=31/15-59/60
3/4м=124/60-59/60=65/60=1 5/60=1 1/12
м=1 1/12:3/4
м=13/12:3/4
м=13/12*4/3
м=13/9(сокращаем)1 4/9
в)(3/14+5/21х)-3/7 =3 1/4
3/14+5/21х=3 1/4+3/7
3/14+5/21х=3 19/28
5/21х=3 19/28-3/14
5/21х=3 13/28
х= 3 13/28: 5/21
х=97/28*21/5
х=14 77/140
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Answers & Comments
у=1 1/4:7/8
у=5/4*8/7
у=1 3/7
б)2 1/15-3/4м=59/60
3/4м=2 1/15-59/60
3/4м=31/15-59/60
3/4м=124/60-59/60=65/60=1 5/60=1 1/12
м=1 1/12:3/4
м=13/12:3/4
м=13/12*4/3
м=13/9(сокращаем)1 4/9
в)(3/14+5/21х)-3/7 =3 1/4
3/14+5/21х=3 1/4+3/7
3/14+5/21х=3 19/28
5/21х=3 19/28-3/14
5/21х=3 13/28
х= 3 13/28: 5/21
х=97/28*21/5
х=14 77/140