How to use integers in word problems

The transitive property of equality states that: o if a = b, then bra o if a = b, then ac = bc o if a = b and b= c, then a = if a = b and c= c, then a + b = b + c

Which expression is equivalent to the expression shown?

Devaughn's age is three times sydney's age. the sum of their ages is 96. what is sydney's age?