Question

546. Решите уравнения: 5) (8 3/14 - y): 3/7; 6) 3 1/16:(ax-5/16)=7/8

Answer 1

$5)(8 \frac{3}{14} - y) \div \frac{3}{7} = 17 \\ ( \frac{115}{14} - y) \times \frac{7}{3} = 17 \\ \frac{115}{6} - \frac{7}{3} y = 17 \\ 115 - 14y = 102 \\ - 14y = 105 - 115 \\ - 14y = - 13 \\ y = \frac{13}{14}$

3 1/16:(x-5/16)=7/8

49/16:16x-5/16=7/8

49×1/16x-15=7/8

49/16x-5=7/8

392=7(16x-5)

56=16x-5

-16x=5-56

-16x=61

x=61/16

x=3 13/16

Answer 2

см . ниже

Пошаговое объяснение:

a) (8 3/14 - y ): 3/7 =17

(115/14 - y )* 7/3 =17

115/6 - 7/3*y=17 |*6

115- 14y=102

-14y= 102-115

-14y=-13

y= 13/14

б) 3 1/16 : (x- 5/16) = 7/8

49/16 : 16x-5/16 = 7/8

49/16 * 16/16x-5 =7/8

49* 1/16x-15=7/8

49/16x-5= 7/8

392=7(16x-5)

56=16x-5

-16x=-5-56

-16x=-61 |:-16

x=61/16

x≠5/16

x=61/16

x=3 13/16 или 3.8125