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galina1969 [7]
3 years ago
10

Jeremy's grandfather is four times as old as he is. If you add their ages together, you will get ninety. How old is Jeremy's gra

ndfather? A. 18 B. 19 C. 70 D. 72
Mathematics
1 answer:
diamong [38]3 years ago
8 0
Let Jeremy's age be x
if Jeremy's grandfather is four times as old as he is,grandfather's age is 4x
if the sum of their ages is 90, we have
x%2B4x=90
5x=90
x=90%2F5
x=18->Jeremy's age
Jeremy's grandfather will be 4x=4%2A18=72
answer:
D. 72
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