document.write( "Question 325893: How do I Solve the following using elimination method? I get lost when I try. The whole method confesses me I don't know where to start. Math is my weakness \r
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document.write( "4x-2y=16
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document.write( "5x+7y=1 \n" );
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Algebra.Com's Answer #233284 by Apathious(24)![]() ![]() You can put this solution on YOUR website! 4x-2y=16_5x+7y=1\r \n" ); document.write( "\n" ); document.write( "Multiply each equation by the value that makes the coefficients of y equal. This value is found by dividing the least common multiple of the coefficients of y by the current coefficient. In this case, the least common multiple is 14. \n" ); document.write( "7*(4x-2y=16)_2*(5x+7y=1)\r \n" ); document.write( "\n" ); document.write( "Multiply each equation by the value that makes the coefficients of y equal. This value is found by dividing the least common multiple of the coefficients of y by the current coefficient. In this case, the least common multiple is 14. \n" ); document.write( "7*(4x-2y)=7(16)_2*(5x+7y)=2(1)\r \n" ); document.write( "\n" ); document.write( "Multiply 7 by each term inside the parentheses. \n" ); document.write( "7*(4x-2y)=112_2*(5x+7y)=2(1)\r \n" ); document.write( "\n" ); document.write( "Multiply 7 by each term inside the parentheses. \n" ); document.write( "(28x-14y)=112_2*(5x+7y)=2(1)\r \n" ); document.write( "\n" ); document.write( "Remove the parentheses around the expression 28x-14y. \n" ); document.write( "28x-14y=112_2*(5x+7y)=2(1)\r \n" ); document.write( "\n" ); document.write( "Multiply 2 by each term inside the parentheses. \n" ); document.write( "28x-14y=112_2*(5x+7y)=2\r \n" ); document.write( "\n" ); document.write( "Multiply 2 by each term inside the parentheses. \n" ); document.write( "28x-14y=112_(10x+14y)=2\r \n" ); document.write( "\n" ); document.write( "Remove the parentheses around the expression 10x+14y. \n" ); document.write( "28x-14y=112_10x+14y=2\r \n" ); document.write( "\n" ); document.write( "Add the two equations together to eliminate y from the system. \n" ); document.write( "10x+14y=2_28x-14y=112_38x =114\r \n" ); document.write( "\n" ); document.write( "Divide each term in the equation by 38. \n" ); document.write( "x=3\r \n" ); document.write( "\n" ); document.write( "Substitute the value found for x into the original equation to solve for y. \n" ); document.write( "28(3)-14y=112\r \n" ); document.write( "\n" ); document.write( "Multiply 28 by each term inside the parentheses. \n" ); document.write( "84-14y=112\r \n" ); document.write( "\n" ); document.write( "Move all terms not containing y to the right-hand side of the equation. \n" ); document.write( "-14y=28\r \n" ); document.write( "\n" ); document.write( "Divide each term in the equation by -14. \n" ); document.write( "y=-2\r \n" ); document.write( "\n" ); document.write( "This is the final solution to the independent system of equations. \n" ); document.write( "x=3_y=-2 \n" ); document.write( " |