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4^(x-1)+4^(x)+4^(x-1)=84
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6 votes
4^(x-1)+4^(x)+4^(x-1)=84

User TheGeekZn
by
5.0k points

1 Answer

8 votes

Answer:

7.66

Explanation:

Just open the parenthesis.

4x-4+4x+4x-4=84

Now simplify and solve

12x-8=84

12x=92

x= 7.66

User Alen
by
4.9k points
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