3 * 16^x 2*81^x = 5*36^x 3 * 2^4x 2*3^4x = 5*(2*3)^2x 3 * 2^4x 2*3^4x = (3 2)*(2*3)^2x 3 * 2^4x 2*3^4x = 3*(2*3)^2x 2*(2*3)^2x 3 * 2^4x - 3*(2*3)^2x = 2*(2*3)^2x-2*3^4x 3 *2^2x(2^2x -3^2x) = 2*3^2x(2^2x-3^2x) 3 *2^2x(2^2x -3^2x)-2*3^2x(2^2x-3^2x) =0 (3*2^2x-2*3^2x)(2^2x-3^2x) =0 1. 2^2x=3^2x => x=0 2. 3*2^2x=2*3^2x 2^(2x-1)=3^(2x-1) ==>2x-1=0 x=1/2
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