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fatherbamboo
28.06.2019 •
Mathematics
Nancy is 5 years younger than her brother stan. last year she was twice as young as he was. how old is each of them now?
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Ответ:
Nancy is 6 years old and Stan is 11 years old now.
Step-by-step explanation:
Let the present age of Stan be x.
Then age of Nancy = y
x - y = 5
Last year she was twice as young as he was
Age of Nancy last year = y-1
Age of Stan last year = x-1
2 × (y-1)= x-1
2y -2 = 5 + y -1
y = 6
x = y + 5 = 6 + 5 = 11
Nancy is 6 years old and Stan is 11 years old now.
Ответ:
24 68 89
Step-by-step explanation: