Mary is two years older than Robert. The sum of their ages is 28. Write an expression for each person, write the equation for the situation and find out how old each person is.

Answer 1

Robert's current age --- x
Mary's current age ---- x+2

x + x+2 = 28

take it from there

Answer 2

R + R + 2 = 28

2R = 26

R = 13

Robert is 13.