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karmanovanika
@karmanovanika
August 2022
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Найдите значение выражения: 5a-19b+7,если [tex] \frac{3a-5b+4}{5a-3b+4} [/tex] =0.4
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sedinalana
Verified answer
3a-5b+4=2a-1,2b+1,6⇒a=3,8b-2,4
5a-19b+7=5(3,8b-2,4)-19b+7=19b-12-19b+7=-5
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karmanovanika
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Verified answer
3a-5b+4=2a-1,2b+1,6⇒a=3,8b-2,45a-19b+7=5(3,8b-2,4)-19b+7=19b-12-19b+7=-5