document.write( "Question 1158056: x+4y=-10
\n" ); document.write( "2x-y=7
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Algebra.Com's Answer #780974 by MathLover1(20850) $\"\"$ $\"About$

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\n" ); document.write( " $\"x%2B4y=-10\"$ ........eq.1
\n" ); document.write( " $\"2x-y=7\"$ ........eq.2
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\n" ); document.write( "\n" ); document.write( " $\"x%2B4y=-10\"$ ........eq.1, solve for $\"x\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x=-10-4y\"$ ........eq.1a..............substitute in eq.2\r
\n" ); document.write( "\n" ); document.write( " $\"2%28-10-4y%29-y=7\"$ ........eq.2, solve for $\"y\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-20-8y-y=7\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-9y=7%2B20\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-9y=27\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y=27%2F-9\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y=-3\"$ \r
\n" ); document.write( "\n" ); document.write( "go to\r
\n" ); document.write( "\n" ); document.write( " $\"x=-10-4y\"$ ........eq.1a, substitute $\"y\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"x=-10-4%28-3%29\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x=-10%2B12\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x=2\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+2x-7%2C+-x%2F4-10%2F4%29+\"$ \r
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