document.write( "Question 526886: i am having a difficult time trying to solve:
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document.write( "6x - 9y= 25.5
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document.write( "7y - 3x= -14\r
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document.write( "i cannot figure out what i need to do to get the x's and y's to line up in order to solve the equation... \n" );
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Algebra.Com's Answer #348713 by InfantileBear(2)![]() ![]() ![]() You can put this solution on YOUR website! You start with the two original equations: \n" ); document.write( "6x-9y=25.5 \n" ); document.write( "7y-3x=-14 \n" ); document.write( "Take the second equation and multiply it by 2 to get: \n" ); document.write( "14y-6x=-28 \n" ); document.write( "Now you can add the first equation to this equation to cancel out the x's: \n" ); document.write( "(14y-6x=-28) \n" ); document.write( "+(-9y+6x=25.5) \n" ); document.write( "This will give you 5y=-2.5 \n" ); document.write( "If you solve for y, you get y=-.5 and if you plug this number back into one of the original equations,: \n" ); document.write( "6x-9(-.5)=25.5 \n" ); document.write( "you should have x=3.5 \n" ); document.write( "And to check your answer, plug the x and y that you got into one of the original equations and see if it works out. \n" ); document.write( " |