Question

Ali is three times as old as John after three year early will be two and half times as old as John find their present age
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Answer 1

A=3J equation (1) since Ali is 3 times James’ age.

A+3=5/2 (J+3) equation (2)

In 3 years, Ali will be two and half times James’ age. I decided to write 5/2 instead of 2.5 to make it easier.

Substitute in 3J for the A in equation (2).

3J+3=5/2 (J+3)

Multiply the 2 over to get rid of the fraction.

2(3J+3) = 5(J+3)

6J+6 = 5J+15

Rearrange to get the J’s on one side and numbers on the other.

J=9

Ali is 3 times James’s age so A = 27

James is 9 years old and Ali is 27.