Question

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

Answer 1

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

Answer 2

Спасибо