What is (a) if 7x(a)+4x(a)=108?

Fred's age is 7 times Hans.  Ralph's age is 4 times Hans. Together they are 108.  How old is each person?
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Problem: What is (a) if 7x(a)+4x(a)=108?
Fred's age is 7 times Hans.  Ralph's age is 4 times Hans.
Together they are 108.  How old is each person?

Your equation doesn't include Han. If a = Han's age...

a + 7a + 4a = 108
12a = 108
a = 9

Han's age is 9.
Fred's age is 7 * 9 = 63
Ralph's age is 4 * 9 = 36

Together, they are 9 + 63 + 36 = 108.

 

by Level 11 User (78.4k points)

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