document.write( "Question 149355: What would X= And what would Y= if,\r
\n" ); document.write( "\n" ); document.write( "-2x - 3y = -3
\n" ); document.write( "and
\n" ); document.write( "4x + 5y = 3\r
\n" ); document.write( "\n" ); document.write( "I Dont understand how to do this, since you cant use substitution ( i dont think)
\n" ); document.write( "And you cant change the signs since they dont have anyn umbers that are alike.\r
\n" ); document.write( "\n" ); document.write( "Ive been stuck on this problem for 11minutes now. :-(\r
\n" ); document.write( "\n" ); document.write( "i Just need to know what X and Y equal.
\n" ); document.write( "And if you could show me How you do it so ill understand for another problem like this i might run into.\r
\n" ); document.write( "\n" ); document.write( "Thank you So much,
\n" ); document.write( "Keith.
\n" ); document.write( "

Algebra.Com's Answer #109570 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
-2x - 3y = -3
\n" ); document.write( "and
\n" ); document.write( "4x + 5y = 3
\n" ); document.write( "---------------------
\n" ); document.write( "Multiply thru the 1st equation by 5.
\n" ); document.write( "Multiply thru the 2nd equation by -3.
\n" ); document.write( "----------------------------
\n" ); document.write( "-10x -15y = -15
\n" ); document.write( "-12x -15y = -9
\n" ); document.write( "---------------
\n" ); document.write( "Subtract the 2nd equation from the 1st to solve for \"x\":
\n" ); document.write( "2x = -6
\n" ); document.write( "x = -3
\n" ); document.write( "------------
\n" ); document.write( "Substitute that into one of the original equations to solve for \"y\":
\n" ); document.write( "-2*-3 -3y = -3
\n" ); document.write( "Divide thru by -3 to get:
\n" ); document.write( "-2 +y = 1
\n" ); document.write( "y = 3
\n" ); document.write( "==============
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "
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