document.write( "Question 766883: elimination method to solve the system of equation.
\n" ); document.write( " 9 + 9b =20
\n" ); document.write( " a + 4b =5 \n" ); document.write( "

Algebra.Com's Answer #467344 by mananth(16946) $\"\"$ $\"About$

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9.00 a + 9.00 b = 20.00 .............1
\n" ); document.write( "Total value
\n" ); document.write( "1.00 a + 4.00 b = 5.00 .............2
\n" ); document.write( "Eliminate y
\n" ); document.write( "multiply (1)by -4.00
\n" ); document.write( "Multiply (2) by 9.00
\n" ); document.write( "-36.00 a -36.00 b = -80.00
\n" ); document.write( "9.00 a + 36.00 b = 45.00
\n" ); document.write( "Add the two equations
\n" ); document.write( "-27.00 a = -35.00
\n" ); document.write( "/ -27.00
\n" ); document.write( "a = 1.30
\n" ); document.write( "plug value of a in (1)
\n" ); document.write( "9.00 a + 9.00 b = 20.00
\n" ); document.write( "11.67 + 9.00 b = 20.00
\n" ); document.write( " 9.00 b = 20.00 -11.67
\n" ); document.write( " 9.00 b = 8.33
\n" ); document.write( " b = 0.93
\n" ); document.write( "x= 1.30
\n" ); document.write( "y= 0.93
\n" ); document.write( "m.ananth@hotmail.ca
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