Question

Pamela is 5 years older than Jiri . The sum of their ages is 45 . What is Jiri's age ?

Answer 1

Jiri's age is 20

Let Pamela's ae be P and Jiri's age be J

From the equation;

P = J + 5 ...............(i)

This is as Pamela is 5 years older

Adding their ages, we have 45

P + J = 45 ........................(ii)

Substitute i into ii

J + 5 + J = 45

2J + 5 = 45

2J = 45-5

2J = 40

J = 40/2

J = 20