document.write( "Question 32692: Use Cramer's Rule to solve the following pair of simultaneous linear equations:
\n" ); document.write( "3x = -7 + 2y; 5y = 8 - 2x
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Algebra.Com's Answer #19187 by mukhopadhyay(490)\"\" \"About 
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3x = -7 + 2y
\n" ); document.write( "=> 3x-2y = -7;
\n" ); document.write( "5y = 8 - 2x
\n" ); document.write( "=> 2x+5y = 8;
\n" ); document.write( "Based on Cramer's rule,
\n" ); document.write( "x = Determinant(x)/Determinant..... (1)
\n" ); document.write( "y = Determinant(y)/Determinant..... (2)
\n" ); document.write( "..
\n" ); document.write( "Determinant {(3,-2);(2,5)} = 15+4 = 19;
\n" ); document.write( "Determinant (x) {(-7,-2);(8,5)} = -35 + 16 = -19;
\n" ); document.write( "Determinant (y) {(3,-7);(2,8)} = 24 + 14 = 38;
\n" ); document.write( "........
\n" ); document.write( "From (1): x = -19/19 = -1;
\n" ); document.write( "From (2): y = 38/19 = 2;
\n" ); document.write( "Answer: x = -1 and y = 2\r
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