document.write( "Question 329560: How would I find x? My problem is (1/4)^(x-1)=32^(x+3). I've tried plugging in numbers but my teacher showed us a formula I think but I never understood it. \n" ); document.write( "
Algebra.Com's Answer #236228 by stanbon(75887) ![]() You can put this solution on YOUR website! How would I find x? My problem is (1/4)^(x-1)=32^(x+3). I've tried plugging in numbers but my teacher showed us a formula I think but I never understood it. \n" ); document.write( "------------------ \n" ); document.write( "(1/4)^(x-1)=32^(x+3) \n" ); document.write( "--- \n" ); document.write( "Change both sides to a common base as follows: \n" ); document.write( "--- \n" ); document.write( "[(2^-2)^(x-1)] = [(2^5)^(x+3)] \n" ); document.write( "----- \n" ); document.write( "2^(-2x+2) = 2^(5x+15) \n" ); document.write( "----- \n" ); document.write( "Equate the exponents: \n" ); document.write( "-2x+2 = 5x+15 \n" ); document.write( "7x = -13 \n" ); document.write( "x = -13/7 \n" ); document.write( "=============== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |