document.write( "Question 296592: Roman, Bob and Roger buy red and green marbles. Red and green marbles don’t have the same price. Roman pays 70 ¢ for four red marbles and two green marbles. Bob pays 95 ¢ for two red marbles and five green marbles. How much will Roger pay if he buys one red marble and one green marble?\r
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Algebra.Com's Answer #213678 by mananth(16946)\"\" \"About 
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Roman, Bob and Roger buy red and green marbles. Red and green marbles don’t have the same price. Roman pays 70 ¢ for four red marbles and two green marbles. Bob pays 95 ¢ for two red marbles and five green marbles. How much will Roger pay if he buys one red marble and one green marble?\r
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\n" ); document.write( "\n" ); document.write( "let each red marble cost x
\n" ); document.write( "let each green marble cost y\r
\n" ); document.write( "\n" ); document.write( "4x+2y=70
\n" ); document.write( "2x+5y=95\r
\n" ); document.write( "\n" ); document.write( "4x+2y -2(2x+5y)=70-190\r
\n" ); document.write( "\n" ); document.write( "4x+2y-4x-10y = -120\r
\n" ); document.write( "\n" ); document.write( "-8y= -120\r
\n" ); document.write( "\n" ); document.write( "y=-120/-8\r
\n" ); document.write( "\n" ); document.write( "y=15 green marble\r
\n" ); document.write( "\n" ); document.write( "4x+2*15=70\r
\n" ); document.write( "\n" ); document.write( "4x+30=70
\n" ); document.write( "4x=40
\n" ); document.write( "x=10 red marble\r
\n" ); document.write( "\n" ); document.write( "1 red &1 green will cost 25 cents\r
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