Four times the dference of a number and three is twelve find the number

the number is 6

let the number be n, then the difference of this number and 3 is n - 3

4 times this is 4 (n - 3) = 12 (solve for n)

divide both sides by 4

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

n = 3 + 3 = 6

the number is 6