Question

If g(x) = 3x - 1 and if g(a) = 7, then which of the following is the value of a?

Answer 1

So,

`g(x) = 3x - 1`

And,

`g(a) = 3a - 1`

But, given g(a) = 7

So, from 2nd and 3rd step,

3a-1=7

3a=6

Therefore, a = 2

Answer 2

8/3

Explanation:

So if a=x then 3a-1=7 therefore 3a=8 and a=8/3