what is the log 5x=log (2x+9)
5x = 2x + 9, where 5x > 0 and 2x + 9 > 0 ;Then, 3x = 9 ;Then, x = 3 ;Verify : 5 × 3 = 2 × 3 + 9 ;correct ! 5 × 3 > 0 ; correct ! 2 × 3 + 9 > 0; correct !