В этом примере ответ не -6
9^(8x + 7/6) = 1/27
3^2(8x + 7/6) = 3^-3
16x + 7/3 = -3
16x = - 3 - 7/3 = - 9/3 - 7/3 = -16/3
x = -1/3
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В этом примере ответ не -6
9^(8x + 7/6) = 1/27
3^2(8x + 7/6) = 3^-3
16x + 7/3 = -3
16x = - 3 - 7/3 = - 9/3 - 7/3 = -16/3
x = -1/3