Instructions

In the following questions, a question is followed by data in the form of two statements labelled as I and II. You must decide whether the data given in the statements are sufficient to answer the questions.

Question 20

What is the value of $$y$$?
(I) $$x = 2y + z$$.
(II) $$x = (y - 1)^{3}$$ and $$x = 8$$.


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