Question

if 9^x-9^x-1=72 then the value of 3x is​

Answer 1

Answer:

6

Step-by-step explanation:

To find value of x:

Being a rather small equation, let's go for trial and error.

Put x=2

We get:

81-9=72

So, x=2

Also, 3x= 3x2=6

Answer 2

Step-by-step explanation:

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