=a^(2n-1-2n-1)b^(3n-1-3n 2)c^2 =bc^2/a^2 27^2x÷9^x÷3^x=27 3^6x÷3^2x÷3^x=27 3^(6x-2x-x)=3^2 6x-2x-x=3