Question

Решите уравнения:
2 и 3​

Answer 1

2) Ответ: 3

$\frac{36}{7 - \frac{5}{6}x } = 8 \\ \frac{36}{ \frac{42 - 5x}{6} } =8 \\ 36 \times \frac{6}{42 - 5x} = 8 \\ \frac{216}{42 - 5x} = 8 \\ 216 = 336 - 40x \\ - 40x = - 120 \\ x = 3$

3) Ответ: 6

$\frac{27}{5 \frac{1}{3} + \frac{1}{9} x} = 4.5 \\ \frac{27}{ \frac{16}{3} + \frac{x}{9} } = 4.5 \\ \frac{27}{ \frac{48 + x}{9} } = 4.5 \\ 27 \times \frac{9}{48 + x} = 4.5 \\ \frac{243}{48 + x} = 4.5 \\ 243 = 216 + 4.5x \\ 4.5x = 27 \\ x = 6$