Question

Maria has three children. There is two years age difference between each child. The total ages of all three children is 36 years old. Rosa is the oldest child. How old is Rosa?Let R= the age of rosaWhich formula will calculate rosa's age?

Answer 1

(R) + (R-2) +(R-4) = 36

1) Gathering the data

Maria (mother)

3 kids

The kids:

Rosa is the eldest so in terms of R we can write:

R, Rosa

R -2, the sibling in the middle

R - 4

2) So we can write out,

(R) + (R-2) +(R-4) = 36

3R -6 = 36

3R = 42

R=14

And the kids are 14,12,10 years old.

3) Hence the answer is (R) + (R-2) +(R-4) = 36