Question

The total age of Sana, Rabia and Saleem is 47 years. What was the total of their ages three years ago?

Answer 1

38

Explanation:

I'll say that Sana's age is A, Rabia's age is B, and Saleem's age is C.

A + B + C = 47

Three years ago, everyone was three years younger, so we can write the expression as:

(A-3) + (B-3) + (C-3) = x

x is the total age three years ago.

The above equation is the same thing as:

A + B + C - 9 = x

Since we know that A + B + C is 47, we use that number instead.

47 - 9 = x

38 = x

So three years ago, their total age was 38 years old.

Answer 2

Let the ages be a, b and c.

a+b+c = 47

Their ages 3 years ago were (a-3)+(b-3)+(c-3)

Thus 3 years ago, their ages were

a+b+c-9

But we know a+b+c = 47,

Thus their ages 3 years ago were

47 — 9

= 38




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