7(9-12x+4)=18x-12
63-84x+28-18x+12=0
63-102x+40=0
x=
x1=
x2=
x1=20/21
x2=2/3
Пошаговое объяснение:
x1=3
x2=0
б)3-6x-x+2=x-2x+8
3-7x+2+x-8=0
-6x-6=0 / :3
-2x-2=0
x=1-+
x1=1-
x2=1+
7(9
-12x+4)=18x-12
63
-84x+28-18x+12=0
63
-102x+40=0
x=
x=
x1=
x2=
x1=20/21
x2=2/3
Пошаговое объяснение:
x1=3
x2=0
б)3
-6x-x+2=x-2x+8
3
-7x+2+x-8=0
x=1-+
x1=1-
x2=1+