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surkova458
@surkova458
August 2022
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найдите значение выражения 9x-(3x+2y), если 3x-y=19
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islam11it
1) y=3x-19
2)9x-(3x+2y)=9x-(3x+2*(3x-19))=9x-3x-6x+38=38
2 votes
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ElvinkaRagimova1
Раскрываем скобки:9х-3х-2у6х-2у6х-2у-это 2(3х-у)значит:6х-2у=19*2
6х-2у=38
1 votes
Thanks 2
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Answers & Comments
2)9x-(3x+2y)=9x-(3x+2*(3x-19))=9x-3x-6x+38=38