5(x-3y)
-12(a+b)
-a(-7+3b)
b(5-2a)
(6x-3)-(5x-2)
-(7a-4)+(9a-8)
28+36
-28+36
28-36-
-28-36-
-28+(-36)
28+(-36)

cgfcb,j

спасибо

5(x-3y)=5x-15y-12(a+b)=-12a-12b-a(-7+3b)=7a-3abb(5-2a)=5b-2ab(6x-3)-(5x-2)=6x-3-5x+2=x-1-(7a-4)+(9a-8)=-7a+4+9a-8=2a-428+36=64-28+36=828-36=-8-28-36=-64-28+(-36)=-6428+(-36)=-8

5х-15у-12а-12b7а-3аb5b-2ab6x-3-5x+2=x-1-7a+4+9a-8=2a-4648-8-64-64-8