Question 1031149
-10 + log3 (n+3) = -10
If you mean log base 3, and if you want to solve for n (you should say that):
Add 10
{{{log(3,(n+3)) = 0}}}
n+3 = 1 -- (Log of 1 to any base = 0)
n = -2
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Clarify the base for the other problems.
-2log5 7x=2

-6log3 (x-3) =-24

Log -m +2 = 4