SOLUTION: Zoron is 10 years older than his sister.In 3 years,he will be twice as old as she will be then. How old are they now?

Question 184257: Zoron is 10 years older than his sister.In 3 years,he will be twice as old as she will be then. How old are they now?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Zoron is 10 years older than his sister.In 3 years,he will be twice as old as she will be then. How old are they now?
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NOW DATA
Let his sister's age be "x" yrs old
Then Zoron is "x+10" yrs old.
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3 yrs from now DATA:
His sister will be "x+3" yrs old
Zoron will be "x+13" yrs old
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Equations:
x+13 = 2(x+3)
x + 13 = 2x + 6
x = 7 (his sister is now 7 yrs old
Zonron is now x+10 = 17 yrs old
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Cheers,
Stan H.
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