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kvasek [131]
3 years ago
15

Solve 3^x − 2 = 3^7 A. 2 B. 5 C. 7 D. 9

Mathematics
1 answer:
Vikki [24]3 years ago
4 0

Answer:

C) 7

Step-by-step explanation:

3^x−2=2187

Step 1: Add 2 to both sides.

3^x−2+2=2187+2

3^x=2189

Step 2: Solve Exponent.

3^x=2189

log(3x)=log(2189)        <<Take log of both sides

x*(log(3))=log(2189)

x= log(2189)/log(3)

x=7.000832

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