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darrengresham999
31.07.2019 •
Mathematics
Write 4.4 as a reduced mixed number
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Ответ:
Ответ:
12
Step-by-step explanation:
Let the age of Ava be x , the age of Aiden be y and the age of Charlie be z.
Average of their age implies : x + y + z / 3 = 8
multiplying through by 3 , we have:
x + y + z = 24 equation 1
Also , twice the sum of ages of Ava and Charlie implies
2 ( x + z) = 24
dividing through by 2 , we have
x + z = 12 equation 2
substituting equation 2 into equation 1 , we have
12 + y = 24
y = 24 - 12
y = 12
Since y represents Aiden's age , this means that Aiden is 12