Question

5/9-x=2/9 13/21+2/21-x при x=11/21

Answer 1

5/9-х=2/9

х=5/9-2/9

х=3/9

5/9-3/9=2/9

13/21+2/21+11/21=26/21=1 5/21

Answer 2

To solve the equations:

1. 5/9 - x = 2/9

2. 13/21 + 2/21 - x

Substituting x = 11/21 into both equations:

1. 5/9 - 11/21 = 2/9 (35/63) - (22/63) = 2/9 13/63 = 2/9

2. 13/21 + 2/21 - 11/21 (13 + 2 - 11)/21 4/21

Therefore, when x = 11/21, the first equation evaluates to 13/63 = 2/9, and the second equation evaluates to 4/21.