Question

if one third of a number is 10 less than the original number,then the number is?

Answer 1

let number:- x
1/3x = x-10
x-3x/3 = -10
-2x/3 = -10
x = -10*3/-2
x = 15

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Answer 2

Given : One third of a number is 10 less than original number.

Let us suppose that the original number is x
Then, According to the question,

$\frac{1}{3} \times x = x- 10$

$= > \frac{x}{3} = x - 10$

$= > \frac{x }{3} - x = - 10$

$= > \frac{x - 3x}{3} = - 10$

$= > \frac{ - 2x}{3} = - 10$

$= > - 2x = - 10 \times 3$

$= > - 2x = - 30$

$= > - x = \frac{ - 30}{2}$

$= > - x = - 15$

$= > x = 15$

Hence, the original number is 15.
That's your answer.

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