exam Maths Puzzle Numerical Ability

A roofer earns $24 per hour plus $36 per hour overtime. If he puts in 40 hours of regular time during a certain week and he wishes to earn $1200, how many hours of overtime should he work?

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I'm still confused on this problem. It states to simplify.

(3x+3y+3)/9x ÷ (x^2+ 2xy+y^2- 1)/(x^4+ x^2 )

My instructor states - Once you get this in the form where you are m How can you find an equation of a line satisfying the given conditions: Perpendicular to x=2 and passing through (3,4)?