2(X+7), 7(5-а), (c-8)*12, 8(4a-3d+11c)
1) 2(X+7)=2х+14 2) 7(5-а)=35-7а 3) (c-8)*12=12с-96 4) 8(4a-3d+11c)=32а-24d+88c