exam Maths Puzzle Numerical Ability

need help bad

1/z+1 - 6-z/6z = 0

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exam Other Question

I am wondering if I can get help with this particular question. I have write it in exponential form.
What I got for this was
4_____
1 / 2 , but it was wrong

The pro use the slope intercept form to graph the equation please show graph. -5x-y=0