document.write( "Question 52478: Hi,\r
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document.write( "We did linear equations last week in class, and now we've moved on to graphing, but I can't do my homework because I still don't understand the linear equations yet!\r
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document.write( "On the blackboard, our teacher explained that the answer to:\r
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document.write( "x + 2y = 0 \r
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document.write( "is \r
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document.write( "y = -1/2x\r
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document.write( "If someone could explain how our teacher got to that answer, I'd REALLY appreciate it!!\r
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document.write( "Also, the book we're using said to just guess a number for x, and then figure out y... does that mean everyone will get a different answer?\r
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document.write( "Thanks,
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document.write( "~ Jasmine
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document.write( "
Algebra.Com's Answer #35020 by checkley71(8403)![]() ![]() ![]() You can put this solution on YOUR website! X+2Y=0 OR 2Y=-X+0 OR Y=-X/2 OR Y=-(1/2)X\r \n" ); document.write( "\n" ); document.write( "IF YOU PICK A VALUE FOR Y AND SOLVE FOR X THIS WILL GIVE YOU A POINT ON THE LINE. THERE ARE MANY POINTS ON THE LINE THEREFORE MANY DIFFERENT VALUES FOR X7Y\r \n" ); document.write( "\n" ); document.write( "EXAMPLE LET Y=10 THEN 10=-(1/2)X OR OR DIVIDING BOTH SIDES BY -1/2 WE GET \n" ); document.write( "10/-.5=X OR -20=X THUS THIS POINT IS (-20,10)\r \n" ); document.write( "\n" ); document.write( "LET X=4 AND WE GET Y=-(1/2)4 OR Y=-.5*4 OR Y=-2 THUS THIS POINT IS (4,-2)\r \n" ); document.write( "\n" ); document.write( "HOPE THIS HELPS \n" ); document.write( " |