document.write( "Question 249401: I need help solving this problem using cramer's rule\r
\n" ); document.write( "\n" ); document.write( "-3x-4y=9
\n" ); document.write( "9x+10y=-3 \n" ); document.write( "
Algebra.Com's Answer #181667 by checkley77(12844)\"\" \"About 
You can put this solution on YOUR website!
-3x-4y=9
\n" ); document.write( "9x+10y=-3
\n" ); document.write( "******************
\n" ); document.write( "9/-3 -4/10
\n" ); document.write( "----------- = x
\n" ); document.write( "-3/9 -4/10
\n" ); document.write( "********************
\n" ); document.write( "9*10-(-3)(-4)
\n" ); document.write( "--------------- = x
\n" ); document.write( "-3(10)-(9*-4)
\n" ); document.write( "**************** =78/6=13 ans. for x.
\n" ); document.write( "(90-12)/(-30+36)
\n" ); document.write( "*********************
\n" ); document.write( "-3/9 9/-3
\n" ); document.write( "---------- = y
\n" ); document.write( "-3/9 -4/10
\n" ); document.write( "********************
\n" ); document.write( "-3*-3-9*9
\n" ); document.write( "----------- = 9-81/-30+36=-72/6=-12 ans for y
\n" ); document.write( "-3*10-9*-4
\n" ); document.write( "***********
\n" ); document.write( "Proof:
\n" ); document.write( "-3*-13-4*12=9
\n" ); document.write( "-39+48=9
\n" ); document.write( "9=9
\n" ); document.write( "9*13+10*-12=-3
\n" ); document.write( "117-120=-3
\n" ); document.write( "-3=-3
\n" ); document.write( " \n" ); document.write( "
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