Question

Lisa is 9 years younger than Paul. 7 years ago Paul was 4 times as old. How old is Paul now?

Answer 1

19

Explanation:

Let, the age of Lisa And Paul be x and y respectively.Then,

According to question,

x = y–9 .............(i)

4(x–7) = y–7 ...........(ii)

Now, solving equation (ii). we get,

4(x–7) = y–7

or, 4((y–9)–7) = y–7

or, 4(y–9–7) = y–7

or, 4(y–16) = y–7

or, 4y–64 = y–7

or, 4y–y = –7+64

or, 3y = 57

or, y =57/3

.

. . y = 19

hence, Paul is 19 years old now.

hope it will help you.