document.write( "Question 1089884: Gina's piggy bank contains $10 and $5 coins only. If there are 75 coins worth $450, how many coins each kind are there? \n" ); document.write( "

Algebra.Com's Answer #704254 by Fombitz(32388) $\"\"$ $\"About$

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1. $\"T%2BF=75\"$
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\n" ); document.write( " $\"10T%2B5F=450\"$
\n" ); document.write( "2. $\"2T%2BF=90\"$
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\n" ); document.write( "Substituting from 1 into 2,
\n" ); document.write( " $\"2T%2B%2875-T%29=450\"$
\n" ); document.write( " $\"T%2B75=90\"$
\n" ); document.write( "Solve for T, then use either equation to solve for F.
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