document.write( "Question 195908: How can you solve 6^x+2=3^x+1 with out the calculator? I think you really can't because I tried it with the calculator and x comes out to be -3.584... so then the exponent would be a negative number...so I can't use logs. \n" ); document.write( "
Algebra.Com's Answer #146895 by stanbon(75887) ![]() You can put this solution on YOUR website! 6^(x+2) = 3^(x+1) \n" ); document.write( "(x+2)log6 = (x+1)log3 \n" ); document.write( "--- \n" ); document.write( "[log(6)-log(3)]x = [log(3) - 2log(6)] \n" ); document.write( "--- \n" ); document.write( "x = [log(3) - 2log(6)] / [log(6)-log(3)]\r \n" ); document.write( "\n" ); document.write( "x = log(3/6^2) / log(2)\r \n" ); document.write( "\n" ); document.write( "--- \n" ); document.write( "x = log(1/12)/log(2) \n" ); document.write( "x = log(base 2) (1/12) \n" ); document.write( "================================= \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |