document.write( "Question 416973: Solve using the substitution method
\n" ); document.write( "x + y = -4; y = 3x + 2 \n" ); document.write( "

Algebra.Com's Answer #292027 by MathLover1(20850) $\"\"$ $\"About$

You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( " $\"x+%2B+y+=+-4\"$ .........1
\n" ); document.write( " $\"y+=+3x+%2B+2\"$ ...........2
\n" ); document.write( "-----------------\r
\n" ); document.write( "\n" ); document.write( " $\"x+%2B+y+=+-4\"$ .........1 ...solve for $\"x\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x+=+-y+-4\"$ ...plug in 2\r
\n" ); document.write( "\n" ); document.write( " $\"y+=+3%28-y+-4%29+%2B+2\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y+=+-3y+-12+%2B+2\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y+%2B3y=+-10+\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"4y=+-10+\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y=+-10%2F4+\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y=+-2.5+\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"x+=+-y+-4\"$ ...plug in $\"y\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x+=+-%28-2.5%29+-4\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x+=+2.5+-4\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x+=+-1.5\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "check:\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"x+%2B+y+=+-4\"$ .........1 \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"+-1.5+%2B+%28-2.5%29+=+-4\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"+-1.5+-2.5+=+-4\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"+-4+=+-4\"$
\n" ); document.write( " \n" ); document.write( "

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