If Sarah's bro is 2yrs younger than her, and Sarah's sister is 5 yrs younger than her.
Total age is 87
What is each persons age?
sister 26 1/3
brother 29 1/3
sarah 31 1/3
add on 7 years to the total age (2 for the brother and 5 for the sister) giving 94 and then divide by 3 to get Sarah's age (31 1/3) - then subtract 2 and 5 respectively from that to get the ages of the brother and sister.
These type of questions usually have answers in whole numbers though - is the question typed correctly? It isn't supposed to be "If Sarah's bro is 2yrs younger than her, and Sarah's sister is 5 yrs younger than him
" is it? Or total age is 89