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im stuck on this one

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1 Answer

OK, this is rather general!!!  Here's a simple response:
 
If Jim is 4 years older than twice Mary's age
Let Jim's age = y
Let Mary's age = x
 
y=2x+4
 
If you want X^2, come up with a area problem?  E.g., the area of a square :
A (area) = s(side)^2
 
I'm sure you can take it from here?