I have read my tutorial book over and over but i still cannot understand how to makekthe subject of the below equation.

I really need to understand how this works so please do not give me any answers - just direct me and explain where I go wrong.

The question asks I makekthe subject of;

t=9s/5+4k

I begin by multiplying both sides by (5+4k) giving

t*(5+4k) = 9s/5+4k*(5+4k)

Simplifying gives me

t(5+4k)=9s(i think)

multiplying both sides gives me

5t+4kt=9s

I want to find all the terms that contain the required subject, k, and move them to the left.

4kt=5t+9s

Now i want to subtract and then divide by t which gives

k=5t-9s/4t

Im stabbing in the dark with parts of this equation. Any direction would be appreciated

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