Question 35

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waecmaths question: 

What must be added to $(2x-3y)$ to get $(x-2y)$?

Option A: 

$5y-x$

Option B: 

$y-x$

Option C: 

$x-5y$

Option D: 

$x-y$

waecmaths solution: 

$\begin{align}  & (2x-3y)+[?]=x-2y \\ & ?=(x-2y)-(2x-3y) \\ & [?]=y-x \\\end{align}$

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