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A jar contains n nickels and d dimes there are 20 coins in the jar, and the total value of the coin s is one dollar and forty cents. how many nickels and how many dimes are in the jar?
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A jar contains n nickels and d dimes there are 20 coins in the jar, and the total value of the coin s is one dollar and forty cents. how many nickels and how many dimes are in the jar?

User Nikitz
by
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1 Answer

4 votes
A) n + d = 20
B) .05n + .10d = 1.40 Multiplying A) by -.10
A) -.1n -.1d = -2 Then adding it to B
B) .05n + .10d = 1.40
-.05n = -.60
n = 12 nickels
d = 8 dimes


User Mlc
by
8.3k points
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