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Sagot :
2n=d
nickel is 0,05 dollars dime is 0.1 dollars
0.05(n)+0.1(2n)=3.5
0.25n=3.5
n=14
d=2(14)=28
hope u can understand
nickel is 0,05 dollars dime is 0.1 dollars
0.05(n)+0.1(2n)=3.5
0.25n=3.5
n=14
d=2(14)=28
hope u can understand
d=2n
.05n+.1d=3.5
I multiplied the nickels and dimes by these values because that is their actual monetary value
.05n=3.5-.1d
multiply everything by 20
n=70-2d
d/2=70-2d
.5d+2d=70
2.5d=70
d=28
n=14
so there are 28 dimes and 14 nickels
checking this answer
28 dimes = $2.8
14 nickels = .70
2.8+.7=3.5
.05n+.1d=3.5
I multiplied the nickels and dimes by these values because that is their actual monetary value
.05n=3.5-.1d
multiply everything by 20
n=70-2d
d/2=70-2d
.5d+2d=70
2.5d=70
d=28
n=14
so there are 28 dimes and 14 nickels
checking this answer
28 dimes = $2.8
14 nickels = .70
2.8+.7=3.5
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