56x+240=52090y-74=1967*(72-k)=44884x+360=780135y-11=2946*(108-k)=624

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These are a series of equations. The logic behind these equations may not be clear as they are written in an incomplete format. It seems like they are related to solving for the variables x and y in a system of linear equations.

To solve these equations and find the values of x and y, you would need to provide the complete set of equations and clarify the relationship between the variables k, x, and y in the system. Once the equations are fully formed, you can use algebraic methods such as substitution or elimination to find the values of x and y.