5 log(2) x - 3 log(7) 49= 2 log(2) x

5 log(2) x - 3 log(7) 49= 2 log(2) x

5 log₂ x -  2 log₂ x = 3 log₇49    ОДЗ х>0

3 log₂x  = 3 log₇ 49

log₂ x  =  log₇7²

log₂ x  =  2 log₇7

log₂ x  =  2

х=2²= 4