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rachel693
06.09.2020 •
Mathematics
Jack was 13 years older than Priscilla. together their ages totaled 163 years . What were their ages?
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Ответ:
Jack is 88, Priscilla is 75.
Step-by-step explanation:
Let J represent Jack's age and let P represent Priscilla's age.
Their age totaled 163, so:
And we know that Jack was 13 years older than Priscilla. In other words:
Solve for J and P. To do so, substitute the second equation into the first:
Combine like terms:
Subtract 13 from both sides:
Divide 2 from both sides:
So, Priscilla is 75 years old right now.
Jack is 13 years older meaning that Jack is 88 years right now.
And we're done!
Ответ:
7/50 = .14
7/9 = .7 repeating
11/12 = .916 (with the 6 repeating)