Question 830042
x+y=-3 
x-y=1
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2x = -2
etc
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You can use substitution.
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x+y=-3
x-y=1 --> x = y+1
Sub for x in the 1st eqn
y+1 + y  = -3
2y = -4
etc
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Elimination is the best for this example, imo.