document.write( "Question 969294: Solve and CHECK the system of equations by either substitution or addition method. PLEASE! SHOW ALL WORK AND EVERY STEP. State what method you used and then show what x and Y=\r
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document.write( "3x=-4y+15
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document.write( "8y=-6x+30 \n" );
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Algebra.Com's Answer #592205 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! 3x=-4y+15 --> 3x + 4y = 15 \n" ); document.write( "8y=-6x+30 --> 6x + 8y = 30 \n" ); document.write( "================= \n" ); document.write( "3x + 4y = 15 \n" ); document.write( "6x + 8y = 30 Divide by 2 --> 3x + 4y = 15 \n" ); document.write( "----------------- \n" ); document.write( "3x + 4y = 15 \n" ); document.write( "3x + 4y = 15 \n" ); document.write( "-------------------- Subtract (elimination) \n" ); document.write( "0 = 0 \n" ); document.write( "It's the same equation twice --> dependent. \n" ); document.write( "No unique solution. \n" ); document.write( " \n" ); document.write( " |