Algebra
posted by Spacegazing .
Chris can be paid one of two ways. Plan A is a salary of $420 per month, plus a commission of 7% of sales. Plan B is a salary of $552 per month, plus a commission of 4% of sales. For what amount of sales is Chris better off selecting plan A?
Chris should select plan A for sales greater than$___

420 + .07(420)x > 552 + .04(552)x
Solve for x.