Solving Equations

Adition:
x + 3 = 6
x + 3 + (-3) = 6 + (-3)
x = 3

Subtration:
x - 3 = 3
x - 3 + 3 = 3 + 3
x = 6

Division:
3x = 6
3x/3 = 6/3
x = 2

Multiplication:
y/3 = 2
3 x y/3 = 2 x 3
y = 6