document.write( "Question 61991: 3x + y = 5
\n" ); document.write( "4x - 7y = -10
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Algebra.Com's Answer #42786 by hotrodd(18)\"\" \"About 
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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
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