document.write( "Question 1073089: Write a system of linear equations to represent the situation. Then, answer the question using (a) a table, (b) a graph, and (c) algebra. \r
\n" ); document.write( "\n" ); document.write( "2. You buy 16 candles. Large candles cost $7 each and small candles cost $3 each. You spend $76. How many large candles x and small candles y did you buy?\r
\n" ); document.write( "\n" ); document.write( "Number of candles: Number of large candles plus number of small candles is 16.\r
\n" ); document.write( "\n" ); document.write( "Cost of candles: $7 times number of large candles plus $3 times number of small candles is $76 \n" ); document.write( "

Algebra.Com's Answer #687908 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "You are on the right way:\r\n" );
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document.write( "L + S = 16      (1)   (large candles and small candles)\r\n" );
document.write( "7L + 3S = 76    (2)   (dollars).\r\n" );
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document.write( "Express L = 16 - S from (1) and substitute it into (2), replacing L.\r\n" );
document.write( "You will get a single equation for S:\r\n" );
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document.write( "7*(16-S) + 2S = 76.\r\n" );
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document.write( "Can you complete on your own from this point ?\r\n" );
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\n" ); document.write( "\n" ); document.write( "This method is called the \"Substitution Method\".\r
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