-7 b=7/8 /:(-7) b=7/(-7*8) b= -1/8
- 7b = 7/8 - b = 7/8 :7 - b = 1/8 b = - 1/8 spr. -7 * ( -1/8 ) = 7/8 7/8 = 7/8 L = P