Решите уравнение : a) 31,6x + 5,4x + 5,6 = 116,6 Б) 12 - (3x - 1 5/12) = 10 7/24

А) 31,6x + 5,4x = 116,6 - 5,6

37х=111

$x = \frac{111}{37}$

х=3

Ответ:х=3

Б)

$12 - (3x - \frac{17}{12} ) = \frac{247}{24}$

$12 - 3x + \frac{17}{12} = \frac{247}{24}$

$- 3x = \frac{247}{24} - 12 - \frac{17}{12}$

$- 3x = \frac{247}{24} - \frac{161}{12}$
-3х=247/24-322/24
-3х=-75/24

$- 3x = - \frac{25}{8}$

$3x = \frac{25}{8}$

$x = \frac{25}{8} \div \frac{3}{1} = \frac{25}{8} \times \frac{1}{3} = \frac{25}{24} = 1 \frac{1}{24}$

Ответ:х=1 1/24