Solve 9x-4=7(x+2)

BIDMAS is used to determine the first step in solving this problem. The bracket on the right hand side is expanded first. 9x-4=7x+14. Now the x's and numbers must be moved to opposite sides of the equals sign. 7x must be removed from the right hand side, so this also has to be done to the left hand side. 9x-4-7x=7x+14-7x ---> 2x-4=14. To remove the -4, 4 must be added to both sides: 2x=18. To get x by itself, 2x must be divided by 2, therefore 18 must be too. x=9