SOLUTION: 5 years ago, Mrs. Cruz was 4 times as old as her daughter. Now she is only 3 times as old. Find their present age.

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Question 1058174: 5 years ago, Mrs. Cruz was 4 times as old as her daughter. Now she is only 3 times as old. Find their present age.
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
let x be Mrs. Cruz's age now and y be her daughter's age now, then
:
1) x-5 = 4 * (y-5)
:
2) x = 3y
:
substitute for x in equation 1)
:
3y-5 = 4 * (y-5)
:
3y-5 = 4y -20
:
y = 15
X = 45
:
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Mrs. Cruz is 45 years old now and
her daughter is 15 years old now
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