Maria has three children. There is two years age difference between each child. The total ages of all three children is 36 years. Rosa is the oldest child. How old is Rosa?

Let R = the age of Rosa.

Which formula will calculate Rosa's age?
R + (R - 2) + (R - 4) = 36
R - (R - 2) - (R - 4) = 36
R + 2R + 3R = 36
R + (R + 2) + (R + 4) = 36

Question

Maria has three children. There is two years age difference between each child. The total ages of all three children is 36 years. Rosa is the oldest child. How old is Rosa?

Let R = the age of Rosa.

Which formula will calculate Rosa's age?
R + (R - 2) + (R - 4) = 36
R - (R - 2) - (R - 4) = 36
R + 2R + 3R = 36
R + (R + 2) + (R + 4) = 36

jamesj · Answer

Which one do you think it is and why?

anonymous · Answer

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