document.write( "Question 934706: 2^(x+4)-2^(x+1)=320 \n" ); document.write( "
Algebra.Com's Answer #567699 by MathLover1(20850)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( " \"2%5E%28x%2B4%29-2%5E%28x%2B1%29=320\"\r
\n" ); document.write( "\n" ); document.write( "\"2%5Ex%2A2%5E4-2%5Ex%2A2%5E1=5%2A2%5E6\"\r
\n" ); document.write( "\n" ); document.write( "\"2%5Ex%282%5E4-2%29=5%2A2%5E6\"\r
\n" ); document.write( "\n" ); document.write( "\"2%5Ex%2814%29=5%2A2%5E6\"\r
\n" ); document.write( "\n" ); document.write( "\"2%5Ex=5%2A2%5E6%2F14\"\r
\n" ); document.write( "\n" ); document.write( "\"2%5Ex=5%2A2%5E6%2F7%2A2\"\r
\n" ); document.write( "\n" ); document.write( "\"2%5Ex=160%2F7\"\r
\n" ); document.write( "\n" ); document.write( "\"log+%282%5Ex%29=log%28160%2F7%29\"\r
\n" ); document.write( "\n" ); document.write( "\"x%2Alog+%282%29=log%28160%2F7%29\"\r
\n" ); document.write( "\n" ); document.write( "\"x=log%28160%2F7%29%2Flog+%282%29\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=4.514573172829758240428350112257559367223804767058439828377464\"- exact solution\r
\n" ); document.write( "\n" ); document.write( "\"x=4.514573\" lowest number of decimal places that still gives us correct answer
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