Предмет: Математика, автор: danilpagoni

Сумма двух чисел равна 48 . найдите эти числа , если 3,7 одногоо из них равны 60%другого.

danilpagoni: блин щяс попробую
danilpagoni: на теме не был продул все темы
uh19: )))) ну я пробую.
danilpagoni: щяс тоже попробую сам решить
uh19: если не получится скажу....самой интересно)
danilpagoni: щяс тоже попробую сам решить
uh19: если не получится скажу....самой интересно)
danilpagoni: правельно 3.7
uh19: с три седьмых получился ответ. с 3.7 - нет
uh19: пишу ответ с 3\7.... и буду еще решать\пробовать с 3.7....

Ответы

Автор ответа: uh19
6
пусть х первое число
у второе число
х+у=48 (по условию)
\frac{3}{7} x=0.6 y
0.6  - это 60%    \frac{60}{100} = \frac{6}{10} = \frac{3}{5}
из второго уравнения выведем х
х= \frac{3}{5} y: \frac{3}{7}
x= \frac{21}{15} y
теперь в первое уравнение подставим это значение
\frac{21}{15} y+y=48
\frac{21}{15} y+ \frac{15}{15} y=48
\frac{36}{15} y=48
y=48: \frac{36}{15}
y=20
находим второе число х+20=48  х=48-20  х=28

проверим: \frac{3}{7} одного числа должно быть равно 60% другого
\frac{3}{7} числа 28 - это 12. 60% числа 20 - это тоже 12. Значит числа верные.
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Unlike old cities, such as Rome or London, New York is relatively young.
It was founded in the 17th century. Now New York is the largest city of the
United States and one of the largest cities in the world. Its population is nearly
eight million. It is partly situated at the estuary of the Hudson River on
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China Town where even telephone boxes look like miniature pagodas, and
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stores
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