document.write( "Question 65026: Having difficulty with two problems:\r
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document.write( "2^(x+3)=5^x\r
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document.write( "and\r
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document.write( "10e^(3x-7)=5\r
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document.write( "For 2^(x+3)=5^x I converted it into a log with base of 2\r
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document.write( "log(base2) (2^(x+3)) = log(base2) 5^x\r
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document.write( "x+3=log(base2) 5^x
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document.write( "x=log(base2) (5^x) - 3\r
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document.write( "and get stuck there.. am I even on the right track? As for the 2nd one, I've made no progress at all.
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Algebra.Com's Answer #45550 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Having difficulty with two problems: \n" ); document.write( "2^(x+3)=5^x \n" ); document.write( "Take the log of both sides to get: \n" ); document.write( "(x+3)log2 = xlog5 \n" ); document.write( "Distribute to get: \n" ); document.write( "(log2)x + 3log2 = xlog5 \n" ); document.write( "Get the x-terms together as follows: \n" ); document.write( "(log2-log5)x=-3log2 \n" ); document.write( "Evaluate to get: \n" ); document.write( "-0.39794..x=-0.903089987.. \n" ); document.write( "Divide to get: \n" ); document.write( "x=2.269... \n" ); document.write( "----------------- \n" ); document.write( "and \n" ); document.write( "10e^(3x-7)=5 \n" ); document.write( "Divide by 10 to get: \n" ); document.write( "e^(3x-7)=(1/2) \n" ); document.write( "Take the natural log of both sides to get: \n" ); document.write( "3x-7=ln(1/2) \n" ); document.write( "3x=-0.693147...+7 \n" ); document.write( "3x=6.30685... \n" ); document.write( "x=2.10228... \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |