(6a−8b)−(3a−11b)−(3b+7a)−(5a+b)
6a−8b−3a−(−11b)−(3b+7a)−(5a+b)=
6a−8b−3a+11b−(3b+7a)−(5a+b)=
3a−8b+11b−(3b+7a)−(5a+b)=
3a+3b−(3b+7a)−(5a+b)=
3a+3b−3b−7a−(5a+b)=
3a−7a−(5a+b)=
−4a−(5a+b)=
−4a−5a−b=
−9a−b
Пошаговое объяснение:
