13-3x = 43 -3x = 43-13 -3x = 30 x = -10
x = -3
If: 3x+8 = 14 Then: 3x = 14-8 So: 3x = 6 Divide both sides by 3: x = 2
3x + 2x = 5x. 5x= (-4) X = (-4)/5 x= -0.8
x+30 = 3x-50 x-3x = -50-30 -2x = -80 x = 40
3x=24 x=8
3x=12 3x/3=12/3 x=4
3x-11 for x=9
2y-3x=4
3x + 2y = 12 ie 2y = 12 - 3x so y = 6 - 3x/2
3x-y=9 y=3x-9
3x = (96-75) 3x = 21So X = 7
3x=96-75 3x=21 x=7
13-3x = 43 -3x = 43-13 -3x = 30 x = -10
8-3x = 128 -3x = 128-8 -3x = 120 x = -40
x = -3
-3x + 5 = 20 -3x = 15 x = -5