document.write( "Question 836136: The total cost of five ice creams and four smoothies is 9.20. The total cost of three ice creams and six smoothies id 8.40\r
\n" ); document.write( "\n" ); document.write( "5x + 4y =9.20
\n" ); document.write( "3x + 6y =8.40\r
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\n" ); document.write( "\n" ); document.write( "By solving these equations find the cost of an ice cream and the cost of a smoothie. \n" ); document.write( "
Algebra.Com's Answer #504004 by checkley79(3341)\"\" \"About 
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5x + 4y =9.20 MULTIPLY BY 3
\n" ); document.write( "3x + 6y =8.40 MULTIPLY BY-2 & ADD\r
\n" ); document.write( "\n" ); document.write( "15X+12Y=27.60
\n" ); document.write( "-6X-12Y=-16.80
\n" ); document.write( "----------------
\n" ); document.write( "9X=10.80
\n" ); document.write( "X=10.80/9
\n" ); document.write( "X=1.20 FOR EACH ICE CREAM\r
\n" ); document.write( "\n" ); document.write( "5*1.20+4Y=9.20
\n" ); document.write( "6.00+4Y=9.20
\n" ); document.write( "4Y=9.20-6.00
\n" ); document.write( "4Y=3.20
\n" ); document.write( "Y=3.20/4
\n" ); document.write( "Y=.80 FOR EACH SMOOTHIE\r
\n" ); document.write( "\n" ); document.write( "PROOF:
\n" ); document.write( "3*1.20+6*.80=8.40
\n" ); document.write( "3.60+4.80=8.40
\n" ); document.write( "8.40=8.40 \n" ); document.write( "
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