Eliminate the parameter t to find a Cartesian equation in the form `x = f(y)` for:

`{(x(t) = -5 t^2), (y(t) = 7 + 2 t) :} ` 

The resulting equation, solved for `x` is  

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Box 1: Enter your answer as an equation. Example: y=3x^2+1, 2+x+y=3
Be sure your variables match those in the question