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20 August, 11:15

Nina has $245 in 5 dollar bills and ten dollar bills. She has ten more 5 dollar bills than ten dollar bills. How many of each type of bill does she have?

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  1. 20 August, 14:50
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    A) 5f + 10t = 245

    B) f = t + 10

    B) f - t = 10

    Multiply B by - 5

    B) - 5f + 5t = - 50

    A) 5f + 10t = 245

    15t = 195

    = 13 tens

    and 23 fives
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