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sevianae
@sevianae
July 2022
1
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докажите, что при х-у=11 верно равенство (х-1)(у+1)-(х+1)(у-1)=22
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nastasya03660
Yx+x-y-1-yx+x-y+1=22
2x-2y=22
x-y=11
11=11
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Answers & Comments
2x-2y=22
x-y=11
11=11