2(n+7)=8-n?

[匿名]

2017-09-11 4:43 pm

回答 (2)

[匿名]

2017-09-11 6:16 pm

2n+14=8-n
2n=-6-n
3n=-6
n=-2

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Berm

2017-09-11 10:09 pm

2(n+7)=8-n
2n+14=8-n
3n=-6
n=-2

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