document.write( "Question 1030611: Solve the system of equations by using substitution. Express the answer as an ordered pair:
\n" ); document.write( "x-5y=2
\n" ); document.write( "9x+8=15y \n" ); document.write( "

Algebra.Com's Answer #645447 by mananth(16946) $\"\"$ $\"About$

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1 x + -5 y = 2 .............1
\n" ); document.write( "-5 y = 2 + -1 x
\n" ); document.write( "/ -5 =
\n" ); document.write( " y = - 2/5 + 1/5 x
\n" ); document.write( "9 x + -15 y = -8 .....................2
\n" ); document.write( "Substitute y in (2)
\n" ); document.write( "9 x + -15 ( - 2/5 + 1/5 x ) = -8
\n" ); document.write( "9 x + 6 + -3 x = -8
\n" ); document.write( "9 x -3 x = -14
\n" ); document.write( "6 x = -14
\n" ); document.write( "/ 6
\n" ); document.write( "x= -2 1/3
\n" ); document.write( "Plug the value of x in (1)
\n" ); document.write( "1 x + -5 y = 2
\n" ); document.write( "1 * -2 1/3 + -5 y = 2
\n" ); document.write( "-2 1/3 + -5 y = 2
\n" ); document.write( "-5 y = 4 1/3
\n" ); document.write( "/ -5
\n" ); document.write( "y= - 7/8
\n" ); document.write( "m.ananth@hotmail.ca
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