24. Найдите корень уравнения log₇(8-2x) - log₇8 = log₇(1/40)

log₇((8-2x)/8) = log₇(1/40)

(8-2x)/8 = 1/40

40(8-2x) = 8 => 320 - 80x = 8 => 80x = 312 => x = 312/80 = 3.9