Question

I am thinking of a number.

I multiply it by 12 and subtract 216.
I get the same answer if I multiply
by 2 and subtract 6.
What is my number?​

Answer 1

`21`

Explanation:

Let
`x` be that number.

`12x-216=2x-6`

`12x-2x=-6+216`

`10x=210`

`10x/10=210/10`

`x=21`

21 is the number.

Answer 2

Let n, equal that number.

12n - 216 = 2n - 6

Solve for n:

12n - 216 = 2n - 6

12n - 216 + 216 = 2n - 6 + 216

12n = 2n + 210

12n - 2n = 2n - 2n + 210

10n = 210

10n/10 = 210/10

n = 21

Therefore, the answer si 21.

Best of Luck!