document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=267714>Question 267714</A>: <I><SPAN STYLE=\"word-break: break-all;\"> what is the substitution for<BR>\n" );
document.write( "4y+4x=40<BR>\n" );
document.write( "y=3x-30 </SPAN>\n" );
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document.write( "1.) 4y+4x=40<BR>\n" );
document.write( "2.) y=3x-30\r<BR>\n" );
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document.write( "Based on 2.) we can substitute 3x-30 for y in equation 1.) giving:\r<BR>\n" );
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document.write( "4*(3x-30)+4x = 40<BR>\n" );
document.write( "12x-120+4x = 40<BR>\n" );
document.write( "16x = 160<BR>\n" );
document.write( "x = 10\r<BR>\n" );
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document.write( "Now we can substitute 10 for x in equation 2.) to determine y. </SPAN>\n" );
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