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a) Line 1 assigns $y=\\var{y}$.

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Line 2 assigns $x=\\var{y-5}$.

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Line 3 reassigns $x$ using $x=\\var{y-5}$. Therefore $x=\\var{y+y-5-5}$.

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b) Line 5 sets $z = x + (x/2)$ but then line 6 reassigns $z$ using the previous $z$ value. 

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What is the value of $x$?

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What is the value of $z$?

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> y = {y} 
> x = y - 5 
> x = x + x 
> x 
> z = x + (x/2)
> z = z + 5
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