SOLUTION: Pacita was 25 years old when her first son was born. Today, the sum of their ages is 105. How old are they now?

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Question 1042785: Pacita was 25 years old when her first son was born. Today, the sum of their ages is 105. How old are they now?

Answer by addingup(3677) About Me  (Show Source):
You can put this solution on YOUR website!
let x be the mother and y the son:
x = y+25 (mother was 25 when son was born)
x+y = 105 substitute for x:
y+25+y = 105
2y = 80
y = 40 the son is now 40, and the mother:
x = 40+25 = 65 is the age of the mother
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check;
40+65 = 105 correct
:
John