document.write( "Question 1132158: Solve the linear system:4x+7y=-9 3x=3y+18 \n" ); document.write( "

Algebra.Com's Answer #749087 by MathLover1(20850) $\"\"$ $\"About$

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\n" ); document.write( " $\"4x%2B7y=-9+\"$ .........eq.1
\n" ); document.write( " $\"3x=3y%2B18++\"$ .........eq.2........solve for $\"x\"$
\n" ); document.write( "-----------------------------------
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\n" ); document.write( " $\"x=3y%2F3%2B18%2F3++\"$ .........eq.2
\n" ); document.write( " $\"x=y%2B6++\"$ .............substitute in eq.1
\n" ); document.write( "
\n" ); document.write( " $\"4%28y%2B6+%29%2B7y=-9+\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"4y%2B24%2B7y=-9+\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"11y=-9-24+\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"11y=-33++\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y=-3+\"$ \r
\n" ); document.write( "\n" ); document.write( "go to $\"x+=y%2B6+\"$ ........., substitute $\"y\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x+=-3%2B6+\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x+=3\"$ \r
\n" ); document.write( "\n" ); document.write( "solution:\r
\n" ); document.write( "\n" ); document.write( "( $\"3\"$ , $\"-3\"$ )\r
\n" ); document.write( "\n" ); document.write( " $\"+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+x-6%2C+-4x%2F7-9%2F7%29+\"$ \r
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