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denis23 [38]
3 years ago
7

Y=-x+5 x-y=-9 Solve the system?

Mathematics
2 answers:
hram777 [196]3 years ago
4 0

Answer:

x=-2 y=7

Step-by-step explanation:

Oksanka [162]3 years ago
4 0

Answer:

x=-2 \quad and \quad y=7.

Step-by-step explanation:

\left\{\begin{matrix} y=-x+5 \\  x-y=-9\end{matrix}\right.\\\\\Rightarrow \left\{\begin{matrix} x+y=5 & (1)\\  x-y=-9 & (2)\end{matrix}\right.\\(1) + (2) \Rightarrow 2x=-4 \Rightarrow x=-4:2=-2\\Replace \quad x=-2\quad in \quad(1) \Rightarrow y=5-(-2)=7\\Therefore, \\x=-2 \quad and \quad y=7.

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