document.write( "Question 264295: y=2x
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document.write( "x+y=12 What is the answer in (x,y) form\r
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document.write( "y=1/3x+6
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document.write( "3y-x=24 What is the answer in (x,y) form\r
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document.write( "3x+2y=13
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document.write( "5x=2y+11 What is the answer in (x,y) form\r
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document.write( "6x-2y=6
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document.write( "x+2y=8 What is the answer in (x,y) form \n" );
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Algebra.Com's Answer #194598 by JBarnum(2146)![]() ![]() You can put this solution on YOUR website! y=2x \n" ); document.write( "x+y=12 What is the answer in (x,y) form\r \n" ); document.write( "\n" ); document.write( "y=1/3x+6 \n" ); document.write( "3y-x=24 What is the answer in (x,y) form\r \n" ); document.write( "\n" ); document.write( "3x+2y=13 \n" ); document.write( "5x=2y+11 What is the answer in (x,y) form\r \n" ); document.write( "\n" ); document.write( "6x-2y=6 \n" ); document.write( "x+2y=8 What is the answer in (x,y) form\r \n" ); document.write( "\n" ); document.write( "___________________________________________ \n" ); document.write( "These are all substitution/elimination problems\r \n" ); document.write( "\n" ); document.write( "y=2x \n" ); document.write( "x+y=12 We know what \"y\" equals so put \"2x\" in place of the \"y\" in second equation \n" ); document.write( "x+(2x)=12 add common terms \n" ); document.write( "3x=12 divide by 3 \n" ); document.write( "x=4 \n" ); document.write( "Now we know x=4 so replace \"x\" with \"4\" in the first equation \n" ); document.write( "y=2x \n" ); document.write( "y=2(4) \n" ); document.write( "y=8 \n" ); document.write( "Now we know that y=4 so to put it in (x,y) form just replace the letters with the numbers (4,8) \n" ); document.write( "--------------------------------\r \n" ); document.write( "\n" ); document.write( "y=1/3x+6 \n" ); document.write( "3y-x=24 \n" ); document.write( "Im un able to answer this question completely as I dont know if the first equation is y=(1/3)x +6 or y=1/(3x+6) there will be completely different answers so please be specific when writing the problem. \n" ); document.write( "if I had to guess it would be y=(1/3)x +6. \n" ); document.write( "im going to use the elimination methad as its by far easier then to substitute with fractions. \n" ); document.write( "y-(1/3)x=6 id multiply this line by -3 so i can eliminate the \"y\" \n" ); document.write( "3y-x=24 \n" ); document.write( "-3y+x=-24 well as we can see these 2 equasions completely cancel each other out so the only possible answers can be (8,0) or(0,-24).due to the cancelation one variable must be 0. \n" ); document.write( "-----------------\r \n" ); document.write( "\n" ); document.write( "3x+2y=13 \n" ); document.write( "5x=2y+11 \n" ); document.write( "Id start with the bottom equation to rearange it use the elimination method \n" ); document.write( "5x=2y+11 => 5x-2y=11\r \n" ); document.write( "\n" ); document.write( "3x+2y=13 \n" ); document.write( "5x-2y=11 add vertically \n" ); document.write( "8x+0=24 \n" ); document.write( "x=3 \n" ); document.write( "Plug x=3 into one of the equations to find \"y\" \n" ); document.write( "3(3)+2y=13 \n" ); document.write( "9+2y=13 \n" ); document.write( "2y=4 \n" ); document.write( "y=2 \n" ); document.write( "(x,y)=(3,2) \n" ); document.write( "------------------ \n" ); document.write( " \n" ); document.write( "6x-2y=6 \n" ); document.write( "x+2y=8 \n" ); document.write( "add these vertically \n" ); document.write( "7x+0=14 \n" ); document.write( "x=2 \n" ); document.write( "Plug x=2 into one of the equations to find \"y\" \n" ); document.write( "(2)+2y=8 \n" ); document.write( "2y=6 \n" ); document.write( "y=3 \n" ); document.write( "(x,y)=(2,3) \n" ); document.write( " |