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