document.write( "Question 39963: Anna went to the grocery store. she bough 3 oranges and 6 apples. she paid $4.50. Maria went to the same store and bough 2 oranges and 2 apples. Her cost was $2.10. How much would 1 apple cost?
\n" ); document.write( "thanx \n" ); document.write( "
Algebra.Com's Answer #25363 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Anna went to the grocery store. she bought 3 oranges and 6 apples. she paid $4.50. Maria went to the same store and bough 2 oranges and 2 apples. Her cost was $2.10. How much would 1 apple cost?\r
\n" ); document.write( "\n" ); document.write( "Let price of oranges be \"r\".
\n" ); document.write( "Let price of apples be \"a\".
\n" ); document.write( "EQUATION:
\n" ); document.write( "1st) 3r+6a=450 cents
\n" ); document.write( "2nd) 2r+2a=210 cents\r
\n" ); document.write( "\n" ); document.write( "Multiply the 2nd by 3 and subtract from 1st to get:
\n" ); document.write( "-3r=-180
\n" ); document.write( "r=60 cents (price per orange)
\n" ); document.write( "Substitute into the 1st to get:
\n" ); document.write( "3(60)+6a=450
\n" ); document.write( "180+6a=450
\n" ); document.write( "6a=270
\n" ); document.write( "a=45 cents(price per apple)\r
\n" ); document.write( "\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );