Question

Решите уравнение, 7 класс

Answer 1

$\frac{x-4}{5} = \frac{9}{1} + \frac{2x + 4}{9};$

$\frac{x-4}{5} = \frac{81 + 2x + 4}{9};\\9(x-4) = 5(81 + 2x + 4);\\9x - 36 = 405 + 10x + 20;\\10x-9x = -36-405-20;\\x = -461;$