document.write( "Question 487386: can someone plss help me im very stuck ?\r
\n" ); document.write( "\n" ); document.write( "decide whether the given ordered pair is a solution of the given system.\r
\n" ); document.write( "\n" ); document.write( " 1. (3,-7)
\n" ); document.write( " 5x + y = 8
\n" ); document.write( " 2x - 3y = 28\r
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Algebra.Com's Answer #333036 by Edwin McCravy(20060)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "    (3,-7)\r\n" );
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document.write( "ì5x +  y =  8\r\n" );
document.write( "í\r\n" );
document.write( "î2x - 3y = 28\r\n" );
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document.write( "    \r\n" );
document.write( "Substitute the first number, 3, for x and the second number -7 for y\r\n" );
document.write( "in both equations and see if you end up with the same number on both\r\n" );
document.write( "sides of the equal sign.\r\n" );
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document.write( "Substituting 3 for x and -7 for y in the first equation of the system:\r\n" );
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document.write( "    5x +  y = 8\r\n" );
document.write( "5(3) + (-7) = 8\r\n" );
document.write( "     15 - 7 = 8\r\n" );
document.write( "          8 = 8\r\n" );
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document.write( "So (3,-7) is a solution to the first equation.  But in order to be\r\n" );
document.write( "a solution for the whole system, (3,-7) must also be a solution\r\n" );
document.write( "to the second equation:\r\n" );
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document.write( "Substituting 3 for x and -7 for y in the second equation:\r\n" );
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document.write( "     2x - 3y = 28\r\n" );
document.write( "2(3) - 3(-7) = 28\r\n" );
document.write( "      6 + 21 = 28\r\n" );
document.write( "          27 = 28\r\n" );
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document.write( "So (3,-7) is not a solution to the second equation so it is not\r\n" );
document.write( "a solution to the system.\r\n" );
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document.write( "Edwin
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