document.write( "Question 952013: Determine whether the linear system has one solution, no solution, of infinitely many solutions.
\n" ); document.write( " 3x + y = 12
\n" ); document.write( " y = 3x + 12 \n" ); document.write( "

Algebra.Com's Answer #581406 by MathLover1(20850) $\"\"$ $\"About$

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$\"3x+%2B+y+=+12\"$ ...eq.1
\n" ); document.write( " $\"y+=+3x+%2B+12\"$ ...eq.2
\n" ); document.write( "--------------------------substitute $\"y\"$ from eq.2 in eq.1\r
\n" ); document.write( "\n" ); document.write( " $\"3x+%2B+3x+%2B+12=+12\"$ ...eq.1...solve for $\"x\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"6x=+12-12\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"6x=+0\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"highlight%28x=0%29\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y+=+3x+%2B+12\"$ ...eq.2...substitute $\"0\"$ for $\"x\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y+=+3%2A0+%2B+12\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"highlight%28y+=+12%29\"$ \r
\n" ); document.write( "\n" ); document.write( "the linear system has one solution, and intersection point is: ( $\"0\"$ , $\"12\"$ )\r
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\n" ); document.write( "\n" ); document.write( " $\"+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+15%2C+3x+%2B+12%2C+-3x+%2B+12%29+\"$ \r
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