Question

Luke is 3 times as old as his daughter.
His daughter is j years old.
In 5 years' time, the sum of their ages will be 70.

Answer 1

Answer:

Luke's age is 45 years and daughter's age is 15 years

Step-by-step explanation:

Given : Luke age = 3 x daughter age

           Daughter age = j years

           after 5 years, (3j +5) +(J+5) = 70

Solution :  ( 3j +5 ) +( j+5 ) = 70

               4j + 10 = 70

                      4j = 60

                       j = 60/4

                         = 15 years

                    Daughter age = 15 years

                    Luke's age = Daughter age x 3

                                       = 15 x 3

                                       = 45 years