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Question

five times antonios age plus 3 times kims age equals 56. kims age is also 3 times antonios age. how old is kim ?

Answer 1

Zulema,

Let’s say Antonio’s age is A and Kim’s age is K.

5A + 3K = 56

K = 3A

We can substitute 3A for K in the first equation to get

5A + 3(3A) = 56.

5A + 9A = 56

14A = 56

A = 4. Antonio is 4 years old. If Kim is 3 times Antonio’s age, she is 12.

Now let’s just double check our work:

5 times Antonio’s age + 3 times Kim’s age is 56.

5*4 + 3*12 = 56!

Hope this helps! :)