document.write( "Question 47438: 2^(7 - 3x)=4^-1 \n" ); document.write( "
Algebra.Com's Answer #31330 by longjonsilver(2297)\"\" \"About 
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\"+2%5E%287+-+3x%29+=+4%5E-1+\"
\n" ); document.write( "\"+2%5E%287+-+3x%29+=+%282%5E2%29%5E-1+\"
\n" ); document.write( "\"+2%5E%287+-+3x%29+=+2%5E%28-2%29+\"\r
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\n" ); document.write( "\n" ); document.write( "So we have an equation that says \"2 to power (7-3x)\" is EQUAL to \"2 to power -2\"\r
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\n" ); document.write( "\n" ); document.write( "So, the 2 powers must be the same number.
\n" ); document.write( "So 7-3x = -2
\n" ); document.write( "7+2 = 3x
\n" ); document.write( "9 = 3x
\n" ); document.write( "or 3x = 9
\n" ); document.write( "--> x = 3\r
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\n" ); document.write( "\n" ); document.write( "jon
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