I got x = 22/15
What I did was looked at each size of the equal sign separately and re ordered it so that all the variables with x are together and all that do not have x are together (do this for both sides). Then i just added and subtracted. Once you simplify the equation (20x - 11 = 5x + 11), you want to get all the variables with x to the opposite side of those without. (15x = 22). then divide the number attached to x