waecmaths question:
Find the value of P if $\tfrac{1}{4}p+3q=10$and $2p-\tfrac{1}{3}q=7$
Option A:
4
Option B:
3
Option C:
–3
Option D:
–4
waecmaths solution:
$\begin{align} & \tfrac{1}{4}p+3q=10---(i) \\ & 2p-\tfrac{1}{3}q=7----(ii) \\ & \text{Multiply }(ii)\text{ by 9} \\ & 18p-3q=63----(iii) \\ & \text{Add }(i)\text{ and }(iii)\text{ together} \\ & \frac{73}{4}p=73 \\ & p=4 \\\end{align}$
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