Question

I think of a number, treble it and take 6 from my answer.

If the result is 18, find the number.

Answer 1

number is 8

Explanation:

let the number be n then trebling it ( multiplying it by 3 ) is 3n, then subtracting 6 from this is 3n - 6 , so

3n - 6 = 18 ( add 6 to both sides )

3n = 24 ( divide both sides by 3 )

n = 8

that is the number thought of is 8