СВ Строганов Василий (х+25) / (x-7) = -3 [x не равно 7] x+25 = -3*(x-7) x+25 = -3x + 21 x + 3x = 21 - 25 4x = -4 x = -1 (1/12)^(x-18) = 144^x 12^(18-x) = 12^(2x) 18-x = 2x 3x = 18 x = 6