Question

find a number such that lf be added to it the sum is 12 less than double the number

Answer 1

let the number be X. X+X=2X-12. 2X=2X-12. 2X-2X=-12. 0=-12. so the number is 0. I am not sure with my answer. hope it helps you

Answer 2

Let the number be taken as x. According to question x+x=2x-12 and the answer will come zero