Question

Помогите!!!6 класс!!!

Answer 1

$\frac{2}{3} = \frac{6}{2x + 1} \\ 2(2x + 1) = 6 \times 3 \\ 4x + 2 = 18 \\ 4x = 18 - 2 \\ 4x = 16 \\ x = 16 \div 4 \\ x = 4$
ОТВЕТ:4.