document.write( "Question 32692: Use Cramer's Rule to solve the following pair of simultaneous linear equations:
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document.write( "3x = -7 + 2y; 5y = 8 - 2x \n" );
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Algebra.Com's Answer #19187 by mukhopadhyay(490)![]() ![]() ![]() You can put this solution on YOUR website! 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 \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |