Question

the the number is subtracted from 23, the result is 10 less than twice the number ,find the number

Answer 1

Answer:

11.

Step-by-step explanation:

Let the number be = x

The number is subtracted from 23

23 - x  

Number is 10 less than twice the no

2x - 10

23 - x  = 2x - 10

23 + 10 = 2x + x

33 = 3 x

x = 33 / 3

x = 11

Answer 2

That's so easy.. I think it's an aptitude question.
$if \: x \: is \: the \: number \\ \: 23 - x = 2x - 10 \\ 23 = 2x + x - 10 = 3x - 10 \\ 3x = 33 \\ x = 11$
Verification..
$23 - 11 = 2(11) - 10 \\ 12 = 12 \\ lhs \: = \: rhs$