Using the add property to solve equations

[redranger7018]

Using the add property to solve equations

Hello, let see if I can continue this conversation with out being abused or poo’ed on by others.

For example_#03 Solve for x:

I’ve read the text and I’m almost understanding it all, but I have some questions yet. The text from the book is as follows:

“SOLUTION: To solve the equation for x, we need to rewrite the equation in the form x = number. In other words, our goal is to get x alone on one side of the equation. To do so, we add 2 to both sides of the equation.”

This is how it’s written in the book:

X – 2 = 1
X – 2 + 2 = 1 + 2
X = 3

There is no further instructions and when I try I get a funny answer. 2 + 2 = 4, but 1 + 2 = 3. It only works out when I do it like this, substitute 3 for x, 3 – 2 + 2 = 3. Ok then how can you use x to solve for x when you don’t known what x is? Also wouldn’t it be easier to just rewrite the equation in this manner?

X – 2 = 1
X = 1 + 2 = 3
X = 3

 

[jonboy]

Sure you can do that as long as: Whatever you do to one side of the equation you do the same thing to the other side. As long as you do that, you are in perfect shape.

 

[redranger7018]

Hi jonboy, thanks for the help that clears that one up.