2(3Y + 4) -(9Y -7) = 15 надо решить уравнение. Created by anisimovglebushka. matematika-ru

2(3Y + 4) -(9Y -7) = 15 надо решить уравнение...

anisimovglebushka @anisimovglebushka

July 2022 1 42 Report

2(3Y + 4) -(9Y -7) = 15
надо решить уравнение

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aliyas1

Verified answer

$2(3y + 4) -(9y -7) = 15 \\ 6y + 8 - 9y + 7 = 15 \\ - 3y + 15 = 15 \\ -3 y = 15 - 15 \\ - 3y = 0 \\ y = 0$

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2(3×0+ 4) -(9×0 -7) = 15
2×4+7=15
15=15

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