document.write( "Question 672628: what is 2k-6 greater than 3k+2 equal to?
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Algebra.Com's Answer #418217 by DrBeeee(684) ![]() You can put this solution on YOUR website! Given \n" ); document.write( "(1) 2k - 6 > 3k + 2 \n" ); document.write( "Solve this the same way you would if it was an equation, but follow the properties of ineqaulities. \n" ); document.write( "First step is to subtract 2k from each side and get \n" ); document.write( "(2) 2k - 2k - 6 > 3k - 2k + 2 or \n" ); document.write( "(3) -6 > k + 2 \n" ); document.write( "Now subtract 2 from each side and get \n" ); document.write( "(4) -6 -2 > k + 2 - 2 or \n" ); document.write( "(5) -8 > k or \n" ); document.write( "(6) k < -8 \n" ); document.write( "Let try a couple values k to see if we are correct. \n" ); document.write( "First let k = -8, then (1) become \n" ); document.write( "(7) -16 -6 > -24 +2 or \n" ); document.write( "(8) -22 > -22, which is not true. \n" ); document.write( "Let try k = -9, then (1) becomes \n" ); document.write( "(9) -18 - 6 > -27 +2 or \n" ); document.write( "(10) -24 > -25, which is true \n" ); document.write( "So k has to be LESS than -8 to satisfy the given inequality of (1). Just to be sure try k = -7, in (1) and get \n" ); document.write( "(11) -14 -6 > -21 + 2 or \n" ); document.write( "(12) -20 > -19, which is false (not true) \n" ); document.write( "Answer: k < -8 \n" ); document.write( "Note: Neither of the arithmetic operations of subtraction in the above steps \"violate\" the properties (rules) of inequalities. \n" ); document.write( " |