document.write( "Question 835438: 5x + 2y = 8
\n" ); document.write( "x + y = 4\r
\n" ); document.write( "\n" ); document.write( "If you want to solve the system of equations by addition, which of the following could you do?
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Algebra.Com's Answer #503521 by stanbon(75887)\"\" \"About 
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5x + 2y = 8
\n" ); document.write( "x + y = 4
\n" ); document.write( "If you want to solve the system of equations by addition
\n" ); document.write( "----
\n" ); document.write( "Multiply thru the bottom equation by -5::
\n" ); document.write( "5x + 2y = 8
\n" ); document.write( "-5x-5y = -20
\n" ); document.write( "---
\n" ); document.write( "Add and solve for \"y\":
\n" ); document.write( "-3y = -12
\n" ); document.write( "----
\n" ); document.write( "Divide by -3 to get:
\n" ); document.write( "y = 4
\n" ); document.write( "---
\n" ); document.write( "Solve for \"x\":
\n" ); document.write( "x + y = 4
\n" ); document.write( "x + 4 = 4
\n" ); document.write( "x = 0
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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