document.write( "Question 1203967: Solve using any method: Substitution or Addition Method or Elimination Method\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "y = 2x - 3\r
\n" ); document.write( "\n" ); document.write( "-6x + 3y = -9 \n" ); document.write( "

Algebra.Com's Answer #839918 by MathLover1(20850) $\"\"$ $\"About$

You can put this solution on YOUR website!
\r
\n" ); document.write( "\n" ); document.write( " $\"y+=+2x+-+3\"$ ....eq.1
\n" ); document.write( " $\"-6x+%2B+3y+=+-9\"$ .....eq.2
\n" ); document.write( "_________________________________\r
\n" ); document.write( "\n" ); document.write( "using substitution\r
\n" ); document.write( "\n" ); document.write( " $\"-6x+%2B+3y+=+-9\"$ .....eq.2, substitute $\"y\"$ from eq.1\r
\n" ); document.write( "\n" ); document.write( " $\"-6x+%2B+3%282x+-+3%29+=+-9\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-6x+%2B+6x+-+9+=+-9\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-6x+%2B+6x+=+-9%2B9\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"0+=+0\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "it means we have two lines on top of each other, or same line\r
\n" ); document.write( "\n" ); document.write( "let's check eq.2, solve for $\"y\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-6x+%2B+3y+=+-9\"$ .....eq.2\r
\n" ); document.write( "\n" ); document.write( " $\"+3y+=+6x+-9\"$ .....both sides divide by $\"+3\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"+y+=+2x+-3\"$ which is same as eq.1\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );