Question

the present age of father is 10 year more than the ​

Answer 1

Answer:

a) y = 3x + 10

b) 30 years

Step-by-step explanation:

let daughter's age be x and father's age be y.

now according to question,

(a) y = 3x + 10

(b) present age of daughter = 9 years

so age of father is y = 3(9) + 10 = 37

so 7 years ago, age of father = 37-7 = 30 years