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zloy xaker [14]
3 years ago
15

Solve, need an explanation as well. Please

Mathematics
1 answer:
Aliun [14]3 years ago
7 0

Step-by-step explanation:

.05N + .10D = 1.65

.05 is the value of the nickel and .10 is the value of the dime.

N + D = 21 because you have some combination of them that total 21

solve for N: N = 21- D

substitute into the first equation

0.5 (21-D) + .10D = 1.65

1.05 - .05D + .10D = 1.65

.05D = .6

D = 12 you have 12 dimes

21-12 = 9 nickels

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