Question
Use any method to solve the system.$\left\{\begin{array}{c}x-5 y=21 \\ 6 x+5 y=21\end{array}\right.$
Step 1
Step 1: Add the two equations together: \[x - 5y + 6x + 5y = 21 + 21\] This simplifies to: \[7x = 42\] Show more…
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