0
x + y = 18, x - y = 6
y = 18 - x
x - (18 - x) = 6
x - 18 + x = 6
2x - 18 = 6
2x = 24
x = 12
(12) + y = 18
y = 6
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Earn +20 ptsQ: The sum of two numbers is 18 and the their difference is 6?
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