Posted by Vic on Thursday, September 22, 2011 at 8:32pm.
Help need equation
Let 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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