Question 744833
The problem states

Maria's father is four times the age of his daughter.
If Maria was born in 1993, what age is her father?

let x be the age of Maria, then

Maria's father's age is 4x

now Maria was born in 1993 so,

2013 - 1993 = 20 is Maria's current age

this means her father's age = 4*20 = 80