Respuesta :
her brothers's ages are 3 year old and 5 year old.
Jeanna is four years older than the sum (5 + 3) of her brothers.
Let jeanna = j, set the equation:
j = 5 + 3 + 4
Simplify
j = 8 + 4
j = 12
12 years old is your answer
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Jeanna has two brothers, ages 3 and 5
She is 4 years older than the sum of their ages
Sum is addition
( 3 + 5 ) + 4
The + 4 is because to find out how old Jeanna is,
You need to add her age to her brothers' ages
So 8 + 4 = 12
Jeanna is 12 years old
Hope this helps
-GoldenWolfX