Solving Equations

To somebody who has never solved an equation before, this seems rather difficult at first sight. To solve equaqations, you should probably know variables. Variables can be any letter that represents any number, changing. A quantity which may increase or decrease; a quantity which admits of an infinite number of values in the same expression; a variable quantity. I other words, a variable is any letter that can represent any number, and the number can change. In equations, you are trying to find out what the variable is representing in that problem. Or, another way to say it, you are trying to make both sides equal to find the variable. It is very important that whatever you do to one side, you have to do to the other. Here is how to solve one-


ex.
15+x=27

1. Write you problem/equation down on the first line.

2. Now, you might be able to just simply solve this in you're head, but since soliving an equation is a process, and solving equations mentally will not work when you move onto bigger problems, we won't. But, what we have to do now is subtract 15 from itself. But, we can't stop there. Whatever you do to one side you must do to the other. Like this-

15+x=27
-15 -15

As you probably already figured out, subtracting 15 from 15 is going to give you 0. This will always be you're 2nd step to solving you're problem. This is because you want to have the variable by itself.


3. On the next line you will have just you're variable and you're answer. It will look like this-

15+X=27
-15 -15
x=12

Now, you are done solving you're equation. Here is an example of how to do a equation with multiplication and/or division.

ex.

1. y divided by 12=5
2. 12 times y divided by 12=5 times 12
3. y= 60


ex.


1. 6 times y=54
2. divided by 6 divided by 6
3. y=9



That's how you solve equations!