SOLUTION: the ages of a mother and her daughter differ by 21years.if the mother is 8 times as old.find the sum of their ages

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Question 915364: the ages of a mother and her daughter differ by 21years.if the mother is 8 times as old.find the sum of their ages
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
x the daughter's age
mother + daughter
8x + x = 9x
mother + daughter
(x+21) + x = 9x
21 = 7x
3 = x, the daughter's age. Mother is 24 8%2A3
And...checking
sum = 9•3