Today, Jakir is twice as old as Moin. In 5 years, Jakir will be 1.5 times as old as Moin. How old is Jakir today?

Question: Today, Jakir is twice as old as Moin. In 5 years, Jakir will be 1.5 times as old as Moin. How old is Jakir today?

Solution:
Let Jakir’s age = J, Moin’s age = M.
Given:
⇒ J=2M --------------------(Equation 1)
In 5 years:
⇒ J+5=1.5(M+5)J+5=1.5(M+5) ---(Equation 2)

Substitute J=2M (equation 1) in equation (2),
⇒ 2M+5=1.5M+7.5 ⟹ 0.5M=2.5
⟹ M=5
Then, J=2×5=10
Answer: 10