waecmaths question:
When a number is subtracted from 2, the result equals 4 less than one – fifth of the number. Find the number
Option A:
11
Option B:
$\tfrac{15}{2}$
Option C:
5
Option D:
$\tfrac{5}{2}$
waecmaths solution:
$\begin{align} & \text{Let number be }x \\ & 2-x=\frac{x}{5}-4 \\ & \frac{x}{5}+x=2+4 \\ & \frac{6x}{5}=6 \\ & x=5 \\\end{align}$
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