
Alejandro R. answered 05/14/18
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Let's assign letters to the ages of the son and parent. S is for the age of the son and P is for age of the parent. Between the two, they have fifty nine years. The parent and son are also 23 years apart. These two statements can be written as two equations
P + S = 59
P - S = 23
Solving for any of the variables in one equation and plugging it in the other will lead you to the solutions. The son is 18 and the parent is 41.