# Complex numbers (showing simplicity)

Algebra Level 3

If the complex number $$z=x+iy$$ satisfy the equation $$\text{amp}(z-1)=\text{amp}(z+3)$$ , then the value of $$(x-1):y$$ is equal to?

Clarification: $$\text{amp}(z)$$ means amplitude or argument of the complex number $$z$$.

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