x + y = -4
x - y = 10
Add the two equations:
2x = 6
x = 3
Subtract the second original equation from the first:
2y = -14
y = -7
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The answer to your question is 10 and three.10 + 3 = 13 (Sum)10 - 3 = 7 (Difference)I hope this helps.
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