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)
Solve each system of equations by elimination
9. x + y = -5
x - y = 9

(2, -7).

Step-by-step explanation:

x + y = -5

 x - y = 9           Adding, to eliminate y:

2x = 4

x = 2

Plug this into first equation:

2 + y = -5

y = -5 - 2

y = -7.

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step-by-step explanation: