document.write( "Question 623560: Find the value of x in the domain of f(x) = 6 − 4x for which f(x) = 8.\r
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document.write( "x = ? \n" );
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Algebra.Com's Answer #392156 by Theo(13342) You can put this solution on YOUR website! f(x) = 6 - 4x \n" ); document.write( "f(x) = 8 \n" ); document.write( "this means that: \n" ); document.write( "8 = 6 - 4x \n" ); document.write( "subtract 6 from both sides of this equation to get: \n" ); document.write( "2 = - 4x \n" ); document.write( "divide both sides of this equation by -4 to get: \n" ); document.write( "-(2/4) = x \n" ); document.write( "value of x is equal to -(1/2) \n" ); document.write( "plug that into your original equation of: \n" ); document.write( "f(x) = 6 - 4x to get: \n" ); document.write( "f(x) = 6 - 4 * (-1/2) which becomes: \n" ); document.write( "f(x) = 6 + (4/2) which becomes: \n" ); document.write( "f(x) = 6 + 2 which becomes: \n" ); document.write( "f(x) = 8 \n" ); document.write( "when x = -(1/2), f(x) = 8 \n" ); document.write( " \n" ); document.write( " |