3x - 57 = -48
3x = -48 + 57
3x = 9
x = 3
Tk mk nha
3x - 57 = -48
3x = -48 + 57
3x = 9
x = 3
happy new year
3x - 57 = -48
3x = -48 + 57
3x = 9
x = 9 : 3
x = 3
3x - 57 = - 48
3x = - 48 + 57
3x = 9
x = 9 : 3
x = 3
=3 nhaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa