Question #6c1f8

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Question #6c1f8

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Answer 1 · 2016-09-05T07:28:42

#2(10-n)-20# or -2n

Explanation:

The difference between 10 and some number ,n, is 10-n
Twice that is 2(10-n)
If we increase that by -20 we add on -20
Hence #2(10-n)+(-20)#
Or 20-2n-20
Which is -2n

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Question #6c1f8

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