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July 25, 2014

July 25, 2014

Posted by **Vic** on Thursday, September 22, 2011 at 8:32pm.

- Math -
**Vic**, Friday, September 23, 2011 at 12:34amHelp need equation

- Math -
**PsyDAG**, Friday, September 23, 2011 at 2:12pmLet x = maria's age and y = her brother's.

x = 3y

(x+4) = 2(y+4)

Substitute 3y for x in second equation and solve for y. Insert that value into the first equation and solve for x. Check by inserting both values into the second equation.

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