L 3x-2 l +5=7 l 5x+3 l -3=0 Модуль 3х-2 +5=7 Модуль 5х+3 -3=0
Log 5 (7-x) = log 5 (3-x) + 1 log 5 (7-x) = log 5 (3-x) + log 5 (5) log 5 (7-x) = log 5 [5*(3-x)] 7-x = 5*(3-x) 7-x = 15 - 5x 5x = 8 x = 5/8