Question

Log 15 = log(7 - 4x)​

Answer 1

x = -2

Explanation:

1. log (15) = log (7 - 4x), x < 7/4
2. 15 = 7 - 4x
3. 4x = 7 - 15
4. 4x = -8
5. x = -2

Answer 2

x =-2

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