Q5 of 80 Page 48

When I triple a certain number and add 2, I get the same answer as I do when I subtract the number from 50. Find the number.

Let the number be x.

Triple the number = 3x.


The number subtracted from 50 = 50 – x.


According to the given condition,


3x + 2 = 50 – x


⇒ 3x + x = 50 – 2 (Transposing x to LHS and 2 to RHS)


4x = 48


⇒ x = (Transposing 4 to RHS)


x = 12


∴ The required number is 12.


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