document.write( "Question 343930: Susan has a number of dimes and quarters in her pocket. \r
\n" ); document.write( "\n" ); document.write( "She has a total of 84 coins, and the total dollar value of all dimes and quarters is $15.\r
\n" ); document.write( "\n" ); document.write( "Write two equations, using variables “d” and “q” to represent the number of dimes and quarters Susan has.\r
\n" ); document.write( "\n" ); document.write( "Solve those two equations using either the substitution or elimination method to find how many dimes and how many quarters she has.
\n" ); document.write( "

Algebra.Com's Answer #246039 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
given:
\n" ); document.write( "(1) \"d+%2B+q+=+84\"
\n" ); document.write( "(2) \"10d+%2B+25q+=+1500\" (in cents)
\n" ); document.write( "Multiply both sides of (1) by \"10\"
\n" ); document.write( "and subtract (1) from (2)
\n" ); document.write( "(2) \"10d+%2B+25q+=+1500\"
\n" ); document.write( "(1) \"-10d+-+10q+=+-840\"
\n" ); document.write( "\"15q+=+660\"
\n" ); document.write( "\"q+=+44\"
\n" ); document.write( "And, from (1),
\n" ); document.write( "(1) \"d+%2B+q+=+84\"
\n" ); document.write( "\"d+%2B+44+=+84\"
\n" ); document.write( "\"d+=+40\"
\n" ); document.write( "She has 40 dimes and 44 quarters
\n" ); document.write( "check answer:
\n" ); document.write( "(2) \"10d+%2B+25q+=+1500\"
\n" ); document.write( "(2) \"10%2A40+%2B+25%2A44+=+1500\"
\n" ); document.write( "\"400+%2B+1100+=+1500\"
\n" ); document.write( "\"1500+=+1500\"
\n" ); document.write( "OK
\n" ); document.write( "
\n" );