5th Grade Math (Please Check My Work)

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

What is the solution of log2  (3x  -  7)  =  3? 4 5

Ineed to know the answer to this algebra question.