Posted by Annia on Wednesday, December 9, 2009 at 4:44pm.
Let x = Jack's age
Let y = Jen's age
From the information above:
2y = x - 2
x + 3y = 66
Get x on one side for the first equation.
x = 2y + 2
Substitute 2y + 2 for x in the second equation and solve for y. Put that value in the first equation to solve for x. Check by inserting both values into the second equation.
I hope this helps.
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