\begin{aligned} &-x+4y=-9 &y=-2x +6 \end{aligned}
−x+4y=−9
...
Mathematics, 21.05.2020 21:00 johnandashley5p65r4a
\begin{aligned} &-x+4y=-9 &y=-2x +6 \end{aligned}
−x+4y=−9
y=−2x+6
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