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Vika [28.1K]
3 years ago
9

Solve the equation. show all work 18^(r-10)=93

Mathematics
1 answer:
Elina [12.6K]3 years ago
3 0
Recall the logarithm rules :

a^y = x  is the same as log_a x = y

In this case, 

a = 18
y = r - 10
x = 93

So,

18^ (r-10) = 93

is the same as

log_18  93 = r - 10

Solve for r to get :

10 + log_18  93 = r
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