Kak changes the sum of two numbers if a) to the first to add 5, and to the second-3 b) to first composed to add-16, and to the second-3?

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(X + Y ) - the sum of two numbers __________________________ (X + 5) + (Y - 3) = X + Y + the 2nd sum will increase by 2----------------------------------(X - 11) + (Y - 7) = X + Y - 18 sum will decrease by 18
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Answer add