1) a(2-8-3)=а(-13)=-13а2)а(7-13-4)=а(-24)=-24а1)а(2/3-1/2)=1/6a2)a(1/4+1/3)=7/12a
1) 2а-8а-3а=-9a
2) 7а-13а-4а=-10a
1)2/3а-1/2а=1/6a
2)1/4а+1/3а=7/12A
1)1,3а-2+4,6а=5.9a-2
2)5,7а-8-а= 4.7a-8
