Fred is 25 years older than Bill and in 5 years he will be twice as old as Bill. Find their present ages.

Question

Equation please.

Answer 1

Let F= Fred's age and  B = Bill's age, set up a system of 2 equations in 2 variables

 

F = B + 25

 

F+5 = 2(B+5)  and solve using substitution

 

(B+25) + 5 = 2(B+5)

 

B+30 =2B + 10

 

B = 20, F = 45