Question 240097
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Let *[tex \Large m] represent the mother's age.  Let *[tex \Large s] represent the son's age.  Then the first thing we know is:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ m\ =\ s\ +\ 18]


One year ago, mother was *[tex \Large m\ -\ 1], and the son was *[tex \Large s\ -\ 1], and the second thing we know is:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ m\ -\ 1\ =\ 3(s\ -\ 1)]


Now you have two 2-variable linear equations.  Solve the system.  The ordered pair *[tex \Large \left(m,s\right)] will give you your answers.



John
*[tex \LARGE e^{i\pi} + 1 = 0]
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