Maria is 7 years older than her brother Robert and in 2 years her age will be four times what Robert’s age was three years ago. Find their present ages.

Question

Maria is ? years old
Robert is ? years old

Answer 1

You can use 2 variables: m and r and write 2 equations:

 

m = r +7

 

m + 2 = 4( r -3)

 

So 3 * r = 21 or r= 7

 

Robert is 7 years old and Maria is 14 years old.