Posted by Danielle on Thursday, January 17, 2013 at 4:53pm.
Translate this situation into a system of equations of the first degree in two variables and make sure you identify the variables clearly:
Today, the difference in age between a father and his son is 23 years. Two years from now, the father's age will be double the age of his son in two years' time.

Math  Steve, Thursday, January 17, 2013 at 5:15pm
f = s+23
f+2 = 2(s+2)
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