x+4=2x+3

To get the answer for this problem, first get all the x's on one side of the equation.  You do that by subtracting 2x from each side.  That gets you

-x+4 = 3 (because x-2x is -x)

Then you want to get all the numbers on the other side of the equation.  To do that, subtract 4 from each side.  That gets you

-x = -1 (because 3-4 is -1)

Now to make your x positive, multiply both sides by -1.  That gets you

x = 1

And that's your answer.