Apiggy bank contains $5.45 in dimes and quarters. if the bank contains 29 coins, how many quarters are in the bank

Call the number of dimes and the number of quarters .

We know that:

and

By substitution:

There are 17 quarters in the bank.

The question doesn't ask for it but we can also show that:

There are 12 dimes in the bank.

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step-by-step explanation:

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take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.