Question

0=21+x18-2X 9 клас алгебра​

Answer 1

Ответ:

$0 = 21 + x \times 18 - 2x \\ 0 = 21 + 18x - 2x \\ 0 = 21 + 16x \\ - 16x = 21 \\ x = - \frac{21}{16} \\ x = - 1 \frac{5}{16}$