I'm almost 100% sure it's 66.667/100 here are the steps
4.2 Solve : -3x+200 = 0
Subtract 200 from both sides of the equation :
-3x = -200
Multiply both sides of the equation by (-1) : 3x = 200
Divide both sides of the equation by 3:
x = 200/3 = 66.667
