document.write( "Question 567611: 7x+2y=-13
\n" ); document.write( "-3x-8y=-23 using the substitution method \n" ); document.write( "

Algebra.Com's Answer #366634 by stanbon(75887) $\"\"$ $\"About$

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7x+2y=-13
\n" ); document.write( "-3x-8y=-23
\n" ); document.write( "using the substitution method
\n" ); document.write( "-----------
\n" ); document.write( "Modify:
\n" ); document.write( "y = -(7x+13)/2
\n" ); document.write( "3x + 8y = 23
\n" ); document.write( "------------------------
\n" ); document.write( "Substitute for \"y\" and solve for \"x\":
\n" ); document.write( "3x - 8[(7x+13)/2] = 23
\n" ); document.write( "--------------------
\n" ); document.write( "6x-8(7x+13) = 46
\n" ); document.write( "6x-56x-104 = 46
\n" ); document.write( "-50x = 150
\n" ); document.write( "x = -3
\n" ); document.write( "----
\n" ); document.write( "Solve for \"y\":
\n" ); document.write( "y = -(7x+13)/2
\n" ); document.write( "y = -(-21+13)/2
\n" ); document.write( "y = -(-8)/2
\n" ); document.write( "y = 4
\n" ); document.write( "=====================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "================ \n" ); document.write( "

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