Х : ( 4 - 3 1/9) + 2 2/15 = - 3 7/18
х : 8/9 = - 3 7/18 - 2 2/15
х : 8/9 = - (3 35/90 + 2 12/90)
х : 8/9 = - 5 47/90
х= - 5 47/90 * 8/9 = - (497*8)/(90*9) = - (497*4)/(45*9) = -1988/405
х= - 4 368/405
проверим:
- 4 368/405 : (4 - 3 1/9) + 2 2/15 = - 3 7/18
- 4 368/405 : 8/9 + 2 2/15 = - 3 7/18
- 1988/405 * 9/8 + 2 2/15 = - 3 7/18
- (497*1)/(45*2) + 2 2/15 = - 3 7/18
- 5 47/90 + 2 12/90 = - 3 7/18
- ( 5 47/90 - 2 12/90) = - 3 7/18
- 3 35/90 = - 3 7/18
- 3 7/18 = - 3 7/18