Question 51910
265=10d+5n & d+n=40 or d=40-n then 265=10(40-n)+5n or 265=400-10n+5n or

264-400=-5n or 135=5n or n=27 number of nickels the 40-27=13 dimes

proof 10*13+5*27=265 or 130+135=265 or 265=265