Variables and Equations

In math we are learning about variables and equations.
We have to solve equations with addition, division and multiplication.

An example of this would be

x-3=5
x-3+3=5+3
x=8 The reason I had to add 3 to both sides is when you do something to one side you have to do it to the other. I had to add the +3 to the -3 so it would equal 0.