20x -10 = 6+12x

You have to solve for x, so you need to isolate x, to do that, you can subtract 12x from both sides: and you will get -> , now add 10 to both sides and you get rid of that -10 on the left side and you will have -> , now you have 8x=16, you can divide both sides by 8 to get rid of that 8 next to x and you will get -> -> .