Question 41837
Q+D+N=500 OR 2D+D+N=500 OR 3D+N=500 OR N=500-3D

25*2D+10D+5N=8800 SUB 500-3D FOR N & WE GET

50D+10D+5(500-3D)=8800 OR 60D+2500-15D=8800 OR 45D=6300 OR D=6300/45 OR D=140

140*10=1400 2D=280 OR 280*25=7000 & 500-140-280=80 OR 80*5=400

THUS 1400+7000+400=8800 

THERE ARE 280 QUARTERS, 140 DIMES & 80 NICKLES.