document.write( "Question 572239: john has 18 coins all nickels and dimes. if he has $1.45, how much does he have? \n" ); document.write( "
Algebra.Com's Answer #368347 by nyc_function(2741)\"\" \"About 
You can put this solution on YOUR website!
Here is the system of equations you need:\r
\n" ); document.write( "\n" ); document.write( "a + b = 18
\n" ); document.write( "0.05a + 0.10b = 1.45\r
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\n" ); document.write( "\n" ); document.write( "Solve using the substitution method.\r
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