thornlilly17
28.06.2019 •
Mathematics
Pasha has box with 40 coins consisting of dimes, quarters and nickels that are worth $5.25. there are 5 more nickels than quarters.how many of each coin does she have?
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Ответ:
15 Quarters, 20 Nickels, and 5 Dimes
Step-by-step explanation:
Dimes = y
Quarters = x
Nickels = x+5
y:
2x+5+y=40
y=35-2x
Solve:
5(x+5)+25(x)+10(y)=525
Substitute y:
5(x+5)+25(x)+10(35-2x)=525
30x+25+350-20x=525
10x=150
x=15
Ответ:
42+n=51
51-42=n
n=9