0.125 * 8^(2x-5) = (кор2/4)^-4

1/8 * 8^(2x - 5) = (√2/4)^-42^-3 * 2^3(2x-5) = (4/√2)^42^(-3 +6x -15) = 2^8/42^(6x -18) = 2^66x - 18 = 66x = 24x = 4