Preservation of Equality

For all of you math lovers who are spending your Saturday night watching and waiting for the blog to be updated, you're in luck. I wanted to share the following definition with you (Why? Because I care, that's why!):

Preservation of Equality

In algebra, equality is maintained when solving for a variable by performing the same operation on both expressions in an equation.

That is the provincially certified definition, so you can take that to the bank. However, it is a little abstract without a concrete example, so here is one.

x + 5 = 10
    -5     -5
x = 5
 (Also, think of our use of the balance--if i remove or add to one side of the balance/equation without doing the same to the other, it will tip. Do not tip equations; they don't like that).

Check by substituting 5 for x in the original equation: 5 + 5 = 10. Give yourself a gold star. Now we can get back to watching Grizzlies/Thunder. If it was on in Canada. Which it is not. That is depressing.