Im literally in tears this is so frustrating! brainliest answer a coin collector has $1.90 in dimes and nickels. she has seven more dimes than buckles. how many nickels does she have ?

d= dimes

n = nickels

d =n+7

n*.05+.1*d = 1.90

substitute d = n+7

.05n +.1 (n+7) = 1.9

distribute

.05n +.1n +.7 = 1.90

combine like terms

.15n +.7 = 1.9

subtract .7 from each side

.15n = 1.2

divide by .15

n=8

d=n+7

d=15

you have 8 nickels and 15 dimes

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