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missisbessonov
@missisbessonov
August 2022
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6(3х + 5у) + 7х - 5у при х+у = 3
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prettypushkova
Verified answer
6(3х + 5у) + 7х - 5у =
= 18х + 30у + 7х - 5у =
= (18х + 7х) + (30у - 5у) =
= 25х + 25у = 25(х + у)
При х + у = 3
25 * 3 = 75
Ответ: 75.
2 votes
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Answers & Comments
Verified answer
6(3х + 5у) + 7х - 5у == 18х + 30у + 7х - 5у =
= (18х + 7х) + (30у - 5у) =
= 25х + 25у = 25(х + у)
При х + у = 3
25 * 3 = 75
Ответ: 75.