Answer:
-4,5
Step-by-step explanation:
Set up two equations:
1. x+y = 1
2. x-y=-9
Solve it algebraically. You can use elimination or substitution.
Elimination:
x+y=1
- x-y=-9
______
2y=10
y=5
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Now you can substitute:
x+y=1
x+5=1
x=-4
Thus, x=-4 and y=5.
