Question 1193528
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x 50-pese bills;

(x-5) 200-pesos bills

(x-5)/2 500-peso bills.


Thus the total money equation is

    50x + 200*(x-5) + {{{500*((x-5)/2)}}} = 6250  pesos.


Simplify and find x

    2*50x + 2*200*(x-5) + 500*(x-5) = 2*6250

    100x + 400(x-5) + 500*(x-5) = 12500

    100x + 400x - 2000 + 500x - 2500 = 12500

    100x + 400x + 500x = 12500 + 2000 + 2500

           1000x       =        17000

               x       =        17


<U>ANSWER</U>.  17 50-peso bills;  12 200-peso bills and 6 500-peso bills.


<U>CHECK</U>.   17*50 + 12*200 + 6*500 = 6250 pesos, in total.   ! Correct !
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Solved  &nbsp;&nbsp;&nbsp;&nbsp;(using one equation for three unknowns).