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Mavis is 5 years older than her brother. Five years ago she was 2 times older than her brother. How old is each now?
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5 votes
Mavis is 5 years older than her brother. Five years ago she was 2 times older than her brother. How old is each now?

User Christian Kiewiet
by
8.6k points

2 Answers

4 votes
15 and 10 because

five years ago he would be 10 and the brother would be 5 and 10 is double 5

User Technocake
by
8.4k points
3 votes
M=Mavis
B=Brother Age
M=B+5

Five years ago...
M-5
B-5
Since Mavis is twice her brother age you have to multiple by 2
(M-5) = 2(B-5)

Substitute M=B+5
(B+5-5) =2B-10

B=2B-10

-B=10
10+5=15

Mavis is 15
Brother is 10
User EricBoersma
by
8.5k points
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