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OpenStudy (anonymous):
3x - 3y = -9 9x - 9y = -27
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OpenStudy (imstuck):
What, exactly, are you doing with this?
OpenStudy (anonymous):
3X-3Y+81X-9Y=-27 84X-12Y=-27 28X-4Y=-9 X=\[\left(\begin{matrix}4Y-9 \\ 28\end{matrix}\right)\]
OpenStudy (anonymous):
\[\left[\begin{matrix}?\left(\begin{matrix}4Y-9 \\ 28\end{matrix}\right) & ? \\ ? & ?\end{matrix}\right]\]
OpenStudy (anonymous):
X=(4Y-9)/28
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