-45 : 5 . ( -3 - 2x ) = 3
5 . ( -3 - 2x ) = ( -45 ) : 3
5 . ( -3 - 2x ) = -15
-3 - 2x = ( -15 ) : 5
-3 - 2x = -3
2x = ( - 3 ) - ( -3 )
2x = 0
x = 0 : 2
x = 0
=> 5.(-3-2x) = -45 : 3 = -15
=> -3-2x = -15 : 5 = -3
=> 2x = -3 - (-3) = 0
=> x = 0 : 2 = 0
Vậy x = 0
Tk mk nha
-45 : 5.( -3 - 2x) = 3
-9.(-3 - 2x) =3
-3 - 2x = -9 . 3
-3-2x = - 27
2x = -27 -3
2x = -24
x = -24: 2
x= -12