Question 1172651
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Gerardo's age today:  *[tex \Large x]


Alexis' age today:  *[tex \Large y]


So:  *[tex \Large x\ +\ y\ =\ 104]


Gerardo's age 12 years ago:  *[tex \Large x\ -\ 12]


Alexis' age 12 years ago: *[tex \Large y\ -\ 12]


So:  *[tex \Large x\ -\ 12\ =\ 3(y\ -\ 12)] or more simply *[tex \Large x\ -\ 3y\ =\ -24]


Solve the 2X2 system for *[tex \Large x]


																
John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
*[illustration darwinfish.jpg]

From <https://www.algebra.com/cgi-bin/upload-illustration.mpl> 
I > Ø
*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  
								
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