x represents nickels y represents dimes x+y=29 5x+10y=210 multiply the first equation by -5 (elimination method) -5x-5y=-145 then add the two equations together 5y=65 divide 5 from both sides y=13 13 dimes
Devide 29 by 2.10 and you get 13.8095238 then round off to 13 So there are 13 dimes and 16 nickels To check the answer just put 13 x 10 +16 x 5 in a calculator and the answer should be 210
