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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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Marcus Rivera

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โˆ™ 2022-01-28 20:25:24
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Q: The sum of two numbers is 18 and the their difference is 6?
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