Question

how to solve logarithms: 7(exponent) x-3=25

Answer 1

Please clarify: do you mean:
\[7^{x-3}=25\]
or:
\[7^x-3=25\]
Thank you.

Answer 2

The first

Answer 3

Assuming you mean the top equation (the harder one), then:
\[7^{x-3}=25 \implies \log{7^{x-3}} = \log{25} \implies (x-3)\log{7} = \log{25}\]
\[ \implies x = [\log25/\log7] +3\]

Answer 4

Okay great, thank you!