algebra
posted by anna on .
Company A rents copiers for a monthly charge of $360 plus 12 cents per copy. Company B rents copiers for a monthly charge of $720 plus 6 cents per copy. What is the number of copies above which Company A's charges are the higher of the two?

we want x to satisfy:
360 + .12x > 720 + .06x
x > 6000