1) х = 7/27.
2) х = 0.
3) х = 2/9.
Пошаговое объяснение:
1) 19/27 - (х - 10/27) = 2/27
19/27 - х - 10/27 = 2/27
9/27 - х = 2/27
-х = 2/27 - 9/27
-х = - 7/27
х = 7/27
2) 19/15 - 11/15 + х = 8/15
8/15 + х = 8/15
х = 8/15 - 8/15
х = 0
3) 5/9 + х = 8/9 - 1/9
5/9 + х = 7/9
х = 7/9 - 5/9
х = 2/9
1) х = 7/27.
2) х = 0.
3) х = 2/9.
Пошаговое объяснение:
1) 19/27 - (х - 10/27) = 2/27
19/27 - х - 10/27 = 2/27
9/27 - х = 2/27
-х = 2/27 - 9/27
-х = - 7/27
х = 7/27
2) 19/15 - 11/15 + х = 8/15
8/15 + х = 8/15
х = 8/15 - 8/15
х = 0
3) 5/9 + х = 8/9 - 1/9
5/9 + х = 7/9
х = 7/9 - 5/9
х = 2/9