document.write( "Question 528168: Can you solve the system of equation by substitution?
\n" ); document.write( "x-8y=-23
\n" ); document.write( "5y-2x=2\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #349180 by Maths68(1474)\"\" \"About 
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x-8y=-23.....(1)
\n" ); document.write( "5y-2x=2......(2)
\n" ); document.write( "Take (1)
\n" ); document.write( "x-8y=-23
\n" ); document.write( "x=8y-23......(3)
\n" ); document.write( "Put the value of x in (2)
\n" ); document.write( "5y-2(8y-23)=2
\n" ); document.write( "5y-16y+46=2
\n" ); document.write( "5y-16y=2-46
\n" ); document.write( "-11y=-44
\n" ); document.write( "-11y/-11=-44/-11
\n" ); document.write( "y=4\r
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\n" ); document.write( "\n" ); document.write( "Put the value of y in (2)
\n" ); document.write( "5y-2x=2......(2)
\n" ); document.write( "5(4)-2x=2
\n" ); document.write( "20-2x=2
\n" ); document.write( "-2x=2-20
\n" ); document.write( "-2x=-18
\n" ); document.write( "-2x/-2=-18/-2
\n" ); document.write( "x=9
\n" ); document.write( "Solution set (x,y)=(9,4)\r
\n" ); document.write( "\n" ); document.write( "Check
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\n" ); document.write( "Put the values of x and y in (1)
\n" ); document.write( "x-8y=-23.....(1)
\n" ); document.write( "9-8(4)=-23
\n" ); document.write( "9-32=-23
\n" ); document.write( "-23=-23
\n" ); document.write( "Put the values of x and y in (2)
\n" ); document.write( "5y-2x=2......(2)
\n" ); document.write( "5(4)-2(9)=2
\n" ); document.write( "20-18=2
\n" ); document.write( "2=2
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