Question 1168697
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only quarters, dimes, and nickels in her piggy bank. She has twice as many dimes as quarters and has 10 more nickels than quarters. 
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<pre>
quarters          q
dimes            2q
nickels           q+10
</pre>
The way the problem is described suggests you can easily write ONE equation in ONE variable.

{{{25q+10(2q)+5(q+10)=1000}}}

Simplify and solve.