X + X + 1 + X + 2 = 56. To solve for X, you first add the integers together and the X variables together. Then you subtract 3 from each side, followed by dividing by 3 on each side. ...
3X + 3 = 56. 3X + 3 - 3 = 56 - 3.
3X = 53. 3X/3 = 53/3.
X = 17 2/3. Since 17 2/3 is not an integer, there is no true answer to this problem.
