Question

Решите уравнение подробный ответ 9x-8 = 4x+12,
9-7(x+3)=5-4x

Answer 1

Объяснение:

$9x - 8 = 4x + 12 \\ 9x - 4x = 12 + 8 \\ 5x = 12 + 8 \\ 5x = 20 \div 5 \\ x = 4$

$9 - 7(x + 3) = 5 - 4x \\ 9 - 7x - 21 = 5 - 4x \\ - 12 - 7x = 5 - 4x \\ - 7x + 4x = 5 + 12 \\ - 3x = 5 + 12 \\ - 3x = 17 \div ( - 3) \\ x = - \frac{17}{3 } = - 5 \frac{2}{3}$