Question

\(5^{x-1}\)\(-13=612\)

Answer 1

5^x-1-13=612

=>5^x-1=625

=>x-1=4

=>x=5

Vậy x=5

Answer 2

5^x-1=612+13=625

5^x-1=5⁴

suy ra x-1=4

          x=5