Question 355738
Hi,
*Note: Paige will "always" be 10 years older than her brother
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Let x be the brothers age in 7 years.  Then (x+10) is Paige's age in 7 years

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question states in 7 years the following will be true****
(x + 10)= 2x
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10 = x  (10 and 20 will be the brothers & paige's age in 7 years.
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Now, they are 3 and 13