Question

Huilan is 15 years younger than Thomas. The sum of their ages is 65. What is Thomas's age?

Answer 1

Thomas's age: 40

Explanation:

We have:

Thomas's age - Huilan's age = 15 (1)

Thomas's age + Huilan's age = 65 (2)

Add 1 and 2 we have :

2T = 65+15

<=>2T = 80

`<=>T=(80)/(2) =40`

So Thomas's age is 40.

P/s: T is Thomas's age

Answer 2

40 years

Explanation:

Hulian and Thomas together is 65 years

let us suppose hulian is X

now, so Thomas is x+15

so x+x+15=65

so 2x = 65-15

2x=50

x=25

Hulian is 25

and Thomas is 25+15=40