# SOLUTION: okay i just don't know how to put this as an equation? Rosa has \$3.10 in nickles and dimes. She has 10 fewer nickels than she has dimes. How many dimes and nickels does she have?

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 Click here to see ALL problems on Linear-systems Question 266704: okay i just don't know how to put this as an equation? Rosa has \$3.10 in nickles and dimes. She has 10 fewer nickels than she has dimes. How many dimes and nickels does she have?Answer by stanbon(57361)   (Show Source): You can put this solution on YOUR website!Rosa has \$3.10 in nickles and dimes. She has 10 fewer nickels than she has dimes. How many dimes and nickels does she have? ---- Quantity Equation: n = d-10 Value Equation: 10d + 5n = 310 cents ---------------------------------------------- Rearrange and modify the equations: 10d - 10n = 100 10d + 5n = 310 ------------------------- Subtract 1st from 2nd and solve for "n": 15n = 210 n = 14 (# of nickels) --- Since n = d-10, d = 24 (# of dimes) ======================================== Cheers, Stan H. ========================================