waecmaths question:
Solve the equations$\begin{align} & 3x-2y=7 \\ & x+2y=-3 \\\end{align}$
Option A:
$x=1,y=-2$
Option B:
$x=1,y=3$
Option C:
$x=-2,y=-1$
Option D:
$x=4,y=-3$
waecmaths solution:
$\begin{align} & 3x-2y=7---(i) \\ & x+2y=-3---(ii) \\ & \text{Add }(i)\text{ and }(ii) \\ & 4x=4 \\ & x=1 \\ & \text{substitute }1\text{ for }x\text{ into (i)} \\ & 3(1)-2y=7 \\ & -2y=4 \\ & y=-2 \\ & x=1,\text{ }y=-2 \\\end{align}$
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