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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?
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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?

User MikG
by
5.1k 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=80รท7
User Zhambulable
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5.9k points
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