Company A rents copiers for a monthly charge of $200 plus 10 cents per copy. Company B rents copiers for a monthly charge of $400 plus 5 cents per copy. What is the number of copies above which Company A's charges are the higher of the two?

Question

anonymous · Answer

Company A=200+ 0.1x
          Company B=400+0.05x
200+ 0.1(x-400)=400+0.05(x-200)
      200+0.1x-40=400+0.05x-10
          160+ 0.1x  = 390 +0.05x
         0.1x+0.05x = 390-160
                    0.05x = 230
                           x = $4.600