document.write( "Question 1149438: At the local convenience store, 7 bags of chips and 3 containers of dip cost $33. However, 3 bags of chips
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Algebra.Com's Answer #770770 by ikleyn(52787)\"\" \"About 
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document.write( "\"b\" for bags;  \"c\" for containers.\r\n" );
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document.write( "The system of 2 equations in 2 unknowns is\r\n" );
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document.write( "    7b + 3c = 33\r\n" );
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document.write( "    3b + 4c = 25.\r\n" );
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document.write( "Solve using determinants (Cramer's rule).\r\n" );
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document.write( "    b = \"%2833%2A4+-+25%2A3%29%2F%287%2A4-3%2A3%29\" = 3 dollar for bag.\r\n" );
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document.write( "Now, substituting this value  b= 3 into first equation, you get\r\n" );
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document.write( "    c = (33-7*3)/3 = 4 dollars for container.\r\n" );
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\n" ); document.write( "\n" ); document.write( "On Cramer's rule for solving systems of 2 equations in 2 unknowns see the lessons\r
\n" ); document.write( "\n" ); document.write( "    - What is a matrix? \r
\n" ); document.write( "\n" ); document.write( "    - Determinant of a 2x2-matrix \r
\n" ); document.write( "\n" ); document.write( "    - HOW TO solve system of linear equations in two unknowns using determinant (Cramer's rule) \r
\n" ); document.write( "\n" ); document.write( "    - Solving systems of linear equations in two unknowns using the Cramer's rule \r
\n" ); document.write( "\n" ); document.write( "    - Solving word problems by the Cramer's rule after reducing to systems of linear equations in two unknowns \r
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\n" ); document.write( "\n" ); document.write( "Also,  you have this free of charge online textbook in ALGEBRA-II in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-II - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this online textbook under the topic
\n" ); document.write( "     \"2x2-Matrices, determinants, Cramer's rule for systems in two unknowns\" \r
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\n" ); document.write( "\n" ); document.write( "Save the link to this textbook together with its description\r
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\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-II
\n" ); document.write( "https://www.algebra.com/algebra/homework/complex/ALGEBRA-II-YOUR-ONLINE-TEXTBOOK.lesson\r
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\n" ); document.write( "\n" ); document.write( "into your archive and use when it is needed.\r
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