SOLUTION: rea is 5 years older than jen-jen. in 4 years, rea will be twice as old as jen-jen. how old is each.

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Question 509698: rea is 5 years older than jen-jen. in 4 years, rea will be twice as old as jen-jen. how old is each.
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let r = Rea's age now
Let j = Jen-Jen's age now
given:
+r+=+j+%2B+5+
+r+%2B+4+=+2%2A%28j+%2B+4%29+
By substitution:
+j+%2B+5+%2B+4+=+2%2A%28j+%2B+4%29+
+j+%2B+9+=+2j+%2B+8+
+j+=+1+
and
+r+=+j+%2B+5+
+r+=+6+
Jen-Jen is 1
Rea is 6