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Algebra
Pregunta

A number of nickels and dimes have a total value o...

A number of nickels and dimes have a total value of \( \$ 1.65 . \) If the number o nickels and dimes were interchanged, the total value would be \( \$ 1.35 \) . How many nickels and how many dimes are there in the original collection? 

Answer

13 nickels and 7 dimes.

 

\(0.1 x + 0.05 y = 1.65,0.1 y + 0.05 x = 1.35 \quad : \quad x = 13 , y = 7\)

Solución
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