document.write( "Question 798520: what is the value of x in the equation {6x+5y=245 ; 4x+3y=155 using elimination by substitution method? \n" ); document.write( "

Algebra.Com's Answer #482253 by mananth(16946) $\"\"$ $\"About$

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6 x + 5 y = 245 .............1
\n" ); document.write( "5 y = 245 + -6 x
\n" ); document.write( "/ 5 =
\n" ); document.write( " y = 49 + -1.2 x
\n" ); document.write( "4 x + 3 y = 155 .....................2
\n" ); document.write( "Substitute y in (2)
\n" ); document.write( "4 x + 3 ( 49 + -1.2 x ) = 155
\n" ); document.write( "4 x + 147 + -3.6 x = 155
\n" ); document.write( "4 x -3.6 x = 8
\n" ); document.write( "0.4 x = 8
\n" ); document.write( "/ 0.4
\n" ); document.write( "x= 20
\n" ); document.write( "Plug the value of x in (1)
\n" ); document.write( "6 x + 5 y = 245
\n" ); document.write( "6 * 20 + 5 y = 245
\n" ); document.write( "120 + 5 y = 245
\n" ); document.write( "5 y = 125
\n" ); document.write( "/ 5
\n" ); document.write( "y= 25
\n" ); document.write( "m.ananth@hotmail.ca
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