Log 15 = log (7 - 4x)

x = -2

Step-by-step explanation:

log 15 = log (7 - 4x)

The terms inside the log functions must be the same

15 = 7 - 4x

Subtract 7 from each side

15-7 = 7-4x-7

8 = - 4x

Divide each side by - 4

8/-4 = -4x/-4

-2 = x

x = - 2

Step-by-step explanation:

log (15) = log (7 - 4x), x < 7/4 15 = 7 - 4x 4x = 7 - 15 4x = - 8 x = - 2