Question

David is x years old

Martin is 3 years older than David
The sum of their ages is 37
Write an equation based on this
information

Answer 1

X+3=37

Hope this helps!

Answer 2

x+(x+3)=37

Explanation:

'x' is david's age, and since Martin is 3 yrs older then david's age, in this case 'x', we can write martin's age as 'x+3'. And since their ages combine to 37, hence the equation x+(x+3)=37

SOLVED EQUATION (remember you have to isolate the unknown)

x+(x+3)=37

x+x+3=37

2x+3=37

2x+3-3=37-3

2x=34

2x/2=34/2

x=17

17 yrs is David's age

x+3 ---- 17+3=20

20 yrs is Martin's age