document.write( "Question 900830: I am suppose to solve the systems of equations by elimination and I don't understand it. Here is my problem. It says to solve by substitution.
\n" ); document.write( "-5x+3y=12
\n" ); document.write( "x+2y=8 \n" ); document.write( "

Algebra.Com's Answer #546193 by Edwin McCravy(20055) $\"\"$ $\"About$

You can put this solution on YOUR website!

\r\n" );
document.write( "            \r\n" );
document.write( "\r\n" );
document.write( "We look for a term in one of those equations that has a letter\r\n" );
document.write( "with an understood coefficient of 1 or -1.\r\n" );
document.write( "\r\n" );
document.write( "We see that  has a term x with a 1 understood \r\n" );
document.write( "coefficient.  \r\n" );
document.write( "\r\n" );
document.write( "We solve for that letter by getting it alone on one side:\r\n" );
document.write( "\r\n" );
document.write( "            \r\n" );
document.write( "\r\n" );
document.write( "Subtract 2y from both sides\r\n" );
document.write( "                \r\n" );
document.write( "\r\n" );
document.write( "Now in the other equation , substitute (8-2y)\r\n" );
document.write( "for x\r\n" );
document.write( "\r\n" );
document.write( "           \r\n" );
document.write( "           \r\n" );
document.write( "\r\n" );
document.write( "Solve for y\r\n" );
document.write( "\r\n" );
document.write( "           \r\n" );
document.write( "           \r\n" );
document.write( "               \r\n" );
document.write( "               \r\n" );
document.write( "               \r\n" );
document.write( "                \r\n" );
document.write( "\r\n" );
document.write( "Substitute (4) for y in the equation where you solved for x\r\n" );
document.write( "\r\n" );
document.write( "                \r\n" );
document.write( "                \r\n" );
document.write( "                \r\n" );
document.write( "                \r\n" );
document.write( "\r\n" );
document.write( "So that means that the common solution to the pair of equations\r\n" );
document.write( "is (x,y) = (0,4) \r\n" );
document.write( "\r\n" );
document.write( "It means that if you draw the graphs of the two lines they will\r\n" );
document.write( "intersect at the point (0,4)\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Edwin

\n" ); document.write( "

\n" );