Предмет: Математика, автор: RampageDash

Разность двух чисел равна 9. 5% одного из них и 6% второго в сумме дают 2,1. Найдите эти числа.

Ответы

Автор ответа: iriska124
0
пусть одно число Х,второе У
составим и решим уравнение
х-у=9
0,05х+0,06у=2,1
умножим первое уравнение на 0,06
0,06х-0,06у=0,54
0,05х+0,06у=2,1
складываем
0,11х=2,64
х=2,64 ,11
х=24
тогда 
х-у=9
-у=9-24
-у=-15
у=15
Первое число 24,а второе число 15
проверка
1)24-15=9
9-9 (верно)
2)0,05*24+0,06*15=2,1
1,2+0,9=2,1
2,1=2,1 (верно)
Ответ ------ (24,15)
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