Ответ:
1) - 3x - 9= - x+9
-3x +x= 9+9
-2x=18
x= - 9
б
2) 7х - 2х = 5 + 8
а
5) - 25 - 2х = - 10 +3х
-25 +10= 3х +2х
5х = - 15
х= - 3
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Ответ:
1) - 3x - 9= - x+9
-3x +x= 9+9
-2x=18
x= - 9
б
2) 7х - 2х = 5 + 8
а
5) - 25 - 2х = - 10 +3х
-25 +10= 3х +2х
5х = - 15
х= - 3