SOLUTION: The combined age of two people is 75years. In 15years time, one person will be twice the other person's present age. Find their present ages

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Question 618469: The combined age of two people is 75years. In 15years time, one person will be twice the other person's present age. Find their present ages
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
x + y = 75

2(x + 15) = y + 15 ___ 2x + 15 = y

substituting ___ x + (2x + 15) = 75 ___ 3x = 60

solve for x, then substitute back to find y