document.write( "Question 452121: I need some help with the substitution method.
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document.write( "9x +8y= -21
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document.write( "-6x +y=33
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document.write( "I can't figure out the ordered pair. \n" );
document.write( "
Algebra.Com's Answer #310796 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! I need some help with the substitution method. \n" ); document.write( "9x +8y= -21 \n" ); document.write( "-6x +y=33 \n" ); document.write( "I can't figure out the ordered pair. \n" ); document.write( "---- \n" ); document.write( "Solve the lower equation for \"y\": \n" ); document.write( "y = 6x+33 \n" ); document.write( "--- \n" ); document.write( "Substitute into the upper equation: \n" ); document.write( "9x + 8(6x+33) = -21 \n" ); document.write( "9x + 48x + 264 = -21 \n" ); document.write( "57x = 285 \n" ); document.write( "--- \n" ); document.write( "x = 5 \n" ); document.write( "--- \n" ); document.write( "Solve for \"y\": \n" ); document.write( "y = 6x+33 \n" ); document.write( "y = 6*5+33 = 63 \n" ); document.write( "=================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "============ \n" ); document.write( " |