Х - 2.8 = - 1.6
х = 2.8 - 1.6
х = 1.2
2,(7) = 2 7/9 = 2 77/99
3,(91) = 3 91/99
|x - 2 77/99| = 3 91/99
1)
x - 2 77/99 = 3 91/99
x = 2 77/99 + 3 91/99 = 5 168/99 = 6 69/99 = 6 23/33
2)
x - 2 77/99 = -3 91/99
x = 2 77/99 - 3 91/99 = -1 14/99
Ответ: -1,(14) и 6,(69)
Ответ 69/80................................................................