Emma is 10 years old. She asked her father how old he was. Her father answered: "When you will be my age, I will be 70." How old is Emma's father?

Question

Ithas something to do with age

Answer 1

Father’s current age is X

 

Emma’s current age is 10, so in (X - 10) years she will be age X

 

And X (Father’s current age) plus (X - 10) must equal 70 years.

 

So X + X - 10 equals 70, which means that 2X = 80.

 

So the Father’s current age, X, equals what?

Answer 2

10 + x represents Emma at father's age

father's age + x = 70

 

10 + x + x + 70

2x = 60

x = 30

 

10 + 30 = 70

40 + 30 = 70

 

How old is the father?