Cameron is older than drew. The difference in their ages is 1 year. The sum of their ages is 35. How old is cameron and how old is drew

Question

Need help solving it. Its with substitution 

Answer 1

Let C = age of Cameron

Let D = age of Drew

 

C - D = 1  (Cameron is older by one year)

C + D = 35 (Sum of ages is 35)

 

Solve by substitution:

C = D + 1  substitute value for C into second equation.

 

(D+1) + D = 35

2D + 1      = 35

2D            = 34

D              = 17

 

If Drew is 17, then Cameron is 18.  (Back substitute, double check using original language and you have a solution)

 

Regards,

 

Alvin

Answer 2

C = Present age of Cameron

D = Present age of Drew

C = D +1 given

C+ D = 35

Solving 

D = 17  years and  C = 18 years