book Maths Puzzle Numerical Ability

L has y-intercept (0, 2) and is perpendicular to the line with equation
2x - 3y = 6.

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please help me with this question;what is 24/6+3.2/4 equals I tried this, can someone just let me know if I am right?

(x^-1+y^-1)/(x^-1y)
I cancelled out the x^-1, which left me with y^-1/y, which I think is (1/y)/(y)

Thanks!!