document.write( "Question 419661: I always get stuck on this one part of this type of equation and was hoping for an explanation as to how to get past this one point.\r
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document.write( "(3,-8); 6x + 7y = 3
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document.write( "I do fine until I get to...
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document.write( "y-(-8) = -7/6x -21/6
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document.write( "the instructions say to add 8 to both sides
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document.write( "which leaves y = -7/6, but am unable to finish the equation as neither adding or subtracting -8 nor 8 makes the answer correct or make sense to me.
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document.write( "I'm at a loss and am wondering if you could explain to me in simple terms what I am doing wrong or how to finish this equation.
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document.write( "Thank you for any help. \n" );
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Algebra.Com's Answer #293424 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! (3,-8); 6x + 7y = 3 \n" ); document.write( "I do fine until I get to... \n" ); document.write( "y-(-8) = -7/6x -21/6 \n" ); document.write( "the instructions say to add 8 to both sides \n" ); document.write( ". \n" ); document.write( "You don't say, but I think your original problem is asking you for the formula that crosses a certain point and is parallel to a line. \n" ); document.write( "(3,-8); 6x + 7y = 3 \n" ); document.write( ". \n" ); document.write( "first find slope of: \n" ); document.write( "6x + 7y = 3 \n" ); document.write( "7y = -6x + 3 \n" ); document.write( "y = (-6/7)x + 3/7 \n" ); document.write( "slope is -6/7 \n" ); document.write( ". \n" ); document.write( "A line parallel must have the same slope. \n" ); document.write( "So, now we have \n" ); document.write( "slope is -6/7 \n" ); document.write( "and \n" ); document.write( "one point: \n" ); document.write( "(3,-8) \n" ); document.write( ". \n" ); document.write( "Plug into the \"point-slope\" form: \n" ); document.write( "y - y1 = m(x - x1) \n" ); document.write( "y - (-8) = (-6/7)(x - 3) \n" ); document.write( "y + 8 = (-6/7)x + 18/7 \n" ); document.write( "Now, we subtract 8 from both sides: \n" ); document.write( "y = (-6/7)x + 18/7 - 8 \n" ); document.write( "y = (-6/7)x + 18/7 - 56/7 \n" ); document.write( "y = (-6/7)x - 38/7 (this is what they're looking for) \n" ); document.write( " \n" ); document.write( " |