(See) Solve by using the substitution or the elimination by addition method, whichever seems more appropriate 5x+3y=-7 , 7x-3y=55
Question: Solve by using the substitution or the elimination by addition method, whichever seems more appropriate
\[\begin{aligned} & 5x+3y=-7 \\ & 7x-3y=55 \\ \end{aligned}\]
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