2 years ago

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

1 answer:

3 0

Answer:

7.66

Step-by-step explanation:

Just open the parenthesis.

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

Now simplify and solve

12x-8=84

12x=92

x= 7.66

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