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Jamar is four times as old as Josh. In 20 years he will be twice as old as Josh. How old is Jamar?

Jamar is four times as old as Josh. In 20 years he will be twice as old as Josh. How old is Jamar?
asked 10.1k views
1 vote
Jamar is four times as old as Josh. In 20 years he will be twice as old as Josh. How old is Jamar?

asked
User MikG
by
7.6k points

1 Answer

6 votes
simultaneous equations
Jamar=J
Josh=j
4J=j
20+J=2j
Then
4J=j
-4 (J)=-4(2j-20)
So
0=-7j+80
7j=80
j=80÷7
answered
User Zhambulable
by
7.9k points
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