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Old 07-28-2007   #2
Michael A
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N = # of nickels2N = # of dimes (twice as many dimes as nickels)2N + 5 = # of quarters (five more quarters than dimes)Nickels + Dimes + Quarters = 6.50[(.05)*N] + [(.10)*(2N)] + [(.25)*(2N+5)]=6.50 .05N + .20N + .50N + 1.25 = 6.500.75N + 1.25 = 6.50 (subtract 1.25 from both sides) (this line is your equation)0.75N = 5.25 (divide both sides by 0.75)N = 7 (0.35)D = 14 (1.40)Q = 19 (4.75)0.35+1.40+4.75=6.50
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