document.write( "Question 1029197: Log2 (x+20) - log2 (x+2) = log2 x \n" ); document.write( "
Algebra.Com's Answer #644261 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Log2 (x+20) - log2 (x+2) = log2 (x) \n" ); document.write( "---------- \n" ); document.write( "log2[(x+20)/(x+2)] = log2(x) \n" ); document.write( "---------- \n" ); document.write( "Take the anti-log of both sides to get: \n" ); document.write( "(x+20)/(x+2) = x \n" ); document.write( "---------------------- \n" ); document.write( "x^2 + 2x = x+20 \n" ); document.write( "x^2 + x - 20 = 0 \n" ); document.write( "----------- \n" ); document.write( "(x+5)(x-4) = 0o \n" ); document.write( "---- \n" ); document.write( "Acceptable solution: \n" ); document.write( "x = 4 \n" ); document.write( "------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "------------------ \n" ); document.write( " |