Achild finds 30 nickels and dimes between sofa cushions. how many dimes did the child find if the total value of the coins is $1.90?

There would be 4 dimes 30x5=150 10x4=40 150+40=190

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here's your answer⤵

♦a child finds 30 nickels and dimes between the sofa cushions. how many dimes did the child find if the total was $1.90 

Quantity Eq.:: n + d = 30 coins
Value Eq 5n +10d = 190 cents

Modify for elimination:
n + d = 30
n + 2d = 38

Subtract and solve for "d":
d = 8 (# of dimes)
n = 30-8 = 22 (# of nickels)


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