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The sum of two numbers is 55 and the difference is 15 what are the numbers

User BlueIceDJ
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x + y = 55 \\ x - y = 15 \\ \\ 2x = 70 \: \: \: \: \: \: x = 35 \\ y = 55 - x = 55 - 35 = 20

User Mahesh Mesta
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