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ololo11 [35]
3 years ago
11

Jennifer had a total of 20 coins consisting of nickels and quarters. If the value of the coins was $1.80, how many quarters did

she have?
Mathematics
1 answer:
drek231 [11]3 years ago
4 0
N=nickles
q=quarters

n+q=20

5n+25q=180


divide last question by 5
n+5q=36

n+q=20
n+5q=36
multiply top equation by -1 and add to 2nd equato

-n-q=-20
<u>n+5q=36 +</u>
0n+4q=16

4q=16
divide both sides by 4
q=4


4 quarters
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