Решите уравнение7+3(-k-3(k+5))=5(7-2k)+k. Created by Azaz108. matematika-ru

Решите уравнение7+3(-k-3(k+5))=5(7-2k)+k...

August 2022 1 9 Report

Решите уравнение
7+3(-k-3(k+5))=5(7-2k)+k

Answers & Comments

snow99
$7 + 3( - k - 3(k + 5)) = 5(7 - 2k) + k \\ 7 + 3( - k - 3k - 15) = 35 - 10k + k \\ 7 + 3( - 4k - 15) = 35 - 9k \\ 7 - 12k - 45 = 35 - 9k \\ - 12k + 9k = 35 + 45 - 7 \\ - 3k = 73 \\ k = - \frac{73}{3} = - 24 \frac{1}{3}$

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