Respuesta :

gmany

Answer:

Jiri is 10 years old.

Step-by-step explanation:

[tex]J-\text{Jiri's a}\text{ge}\\3J-\text{Pamela's a}\text{ge}\\40-\text{the sum their ages}\\\\\bold{EQUATION:}\\\\J+3J=40\\4J=40\qquad\text{divide both sides by 4}\\J=10[/tex]

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