[Solved] Solve using an algebraic method, working by hand : 3x- 4y=16 , 4x+5y=-20
Question: Solve using an algebraic method, working by hand :
\(\begin{aligned} & \,\,3x-\,\,4y=16 \\ & \,\,4x+5y=-20 \\ \end{aligned}\)
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