document.write( "Question 61991: 3x + y = 5
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document.write( "4x - 7y = -10 \n" );
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Algebra.Com's Answer #42786 by hotrodd(18) ![]() You can put this solution on YOUR website! First, multiply all of equation one by -2 so that both of the equations have the same answer. So you should have: \n" ); document.write( "-6x - 2y = -10 \n" ); document.write( "4x - 7y = -10 \n" ); document.write( "Then, substitute the -10 in the first equation with 4x - 7y from the second equation: \n" ); document.write( "-6x - 2y = 4x - 7y \n" ); document.write( "Next, add 6x and 7y to both sides of the equation: \n" ); document.write( "5y = 10x \n" ); document.write( "Now, divide both sides of the equation by 5 to get: \n" ); document.write( "y = 2x \n" ); document.write( "Substitute 2x with the y in equation #1: \n" ); document.write( "3x + 2x = 5 \n" ); document.write( "Combine like terms: \n" ); document.write( "5x = 5 \n" ); document.write( "Divide each side by 5 \n" ); document.write( "x = 1 \n" ); document.write( "Now, substitute 1 for the x in equation #1: \n" ); document.write( "3(1) + y = 5 \n" ); document.write( "Subtract each side by 3: \n" ); document.write( "y = 2\r \n" ); document.write( "\n" ); document.write( "YOUR ENDING ANSWER IS x = 1 AND y = 2 \n" ); document.write( " |