SOLUTION: jeremaiah is now 10 yrs older than his sister justin. in five years jeremiah's age will be twice justine's age. how old are they now?

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Question 120249: jeremaiah is now 10 yrs older than his sister justin. in five years jeremiah's age will be twice justine's age. how old are they now?
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
JUSTINE=X NOW
JEREMIAH=X+10 NOW
IN 5 YEARS JUSTINE WILL BE X+5
IN 5 YEARS JEREMIAH WILL BE X+10+5=X+15
2(X+5)=(X+15)
2X+10=X+15
2X-X=15-10
X=5 AGE OF JUSTINE NOW.
5+10=15 AGE OF JEREMIAH NOW.
PROOF
2(5+5)=5+15
2*10=20
20=20