Write the exact answer using either base -10 or base -e logarithms

Question

12^×+4=5^4x

Answer 1

12^x+4 = 5^4x

(x + 4) log12 = 4x log5

x(log12 - 4 log5) = -4 log12

x = -4 log12 / (log12 - 4 log5) = 4 log12 / (4 log5 - log12)