Find g (x) if it is known that g (5a) = 20a-9.

Step-by-step explanation:

This is very short if you know the answer.

g (5a) means that where ever you see x on the right, you put in 5a

So g (5a) = b (5a) - 9 The 9 does not come into it.

b*5a = 20a Divide by 5a

b*5a/5a = 20a/5a

b = 4

So g (x) = 4x - 9