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## Answers

Let the variables be a,b

the swapping process:

c=a+b

b=c-b

a=c-b

the swapping process:

c=a+b

b=c-b

a=c-b

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Let the variables be a,b

the swapping process:

c=a+b

b=c-b

a=c-b

the swapping process:

c=a+b

b=c-b

a=c-b