11 more than five of a certain number would be written as 5x+11 and it is (means equal to) twenty more than two times that number, which would be 2x+20. So the equation would be 5x+11=2x+20 -2x -2x (get the x's on one side) 3x+11=20 -11 -11 (get the numbers on one side) 3x=9 /3 /3 (divide by 3, so you can get the x by itself) X=3 (the number is 3)
