Two times Antonio’s age plus three times Sarah’s age equals 34. Sarah’s age is also five times Antonios age. How old is Sarah?
Let Antonio's age be A and Sarah's be S. \(2A + 3S = 34 , S=5A\) . Substituting 5A for S in the first equation we get 17A = 34 and A =2 . Then Sarah's age is 5 times that so it is 10.