Expert Answers
hala718 eNotes educator| Certified Educator

log 5(x-4) = log 7x

Since we have logarithm with the same bases, then the expression inside the lofarithms are equal.

==> 5(x-4)= 7x

Now we will solve for x.

==> 5x - 20 = 7x

==> -2x = 20

==> x = -10