exam Maths Puzzle Numerical Ability

In triangle ABC, C is the right angle, B = 30 degrees, and side b = 3. Find the exact value of the missing sides. Thank you for your help.

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Would you please help me with this problem ;0).
x over x-2, subtract x+1 over x = 8 over x^2-2x

I think the LCD is x^2-2x. I am lost from here. Thank you for your help. Find the rate.

240 pounds of fertilizer
6 lawns
This is supposed to be like a fraction is set up, with a line in between the two. I do not understand rates can someone please help me?