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ss7ja [257]
3 years ago
11

David is 4 years older than triple Marie's age. The difference of their ages is 38. How old is David?​

Mathematics
1 answer:
alexira [117]3 years ago
4 0

Answer:

56

Step-by-step explanation:

Let Davids's age = d

Let Marie's age = m

First part of the question tells us: d=4+(3m)

Second part of the question tells us: d=m+38

Sub in 'm+38' for d:

m+38=4+3m

3m-m=38-4

2m=36

m=18

d=m+38

=18+38

=56

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