First add -3 and 5 than you bring the whole problem down than you add 3g to both sides that cancels (-3g) and leaves 11 alone. 6g + 3g is 9g bring the whole problem down and your left with 2 + 9g = 11. After you subtract 2 from both sides 2-2 cancels out and 11-2 equals 9 you bring the problem one last time. your left with 9g = 9 you divide by 9 both sides you got 9/9 which equals 1 so g = 1.