SOLUTION: The difference between the ages of two brothers today is 4 years. five years ago, the ratio of their ages was 5:7 find the age of younger brother

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Question 996704: The difference between the ages of two brothers today is 4 years. five years ago, the ratio of their ages was 5:7 find the age of younger brother
Answer by lwsshak3(11628) About Me  (Show Source):
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he difference between the ages of two brothers today is 4 years. five years ago, the ratio of their ages was 5:7 find the age of younger brother
let x=age of older brother
x-4=age of younger brother
5 yrs ago:
x-5=age of older brother
x-4-5=x-9=age of younger brother
x-9/x-5=5/7
5x-25=7x-63
2x=38
x=19
x-4=15
age of younger brother=15