ISEE Middle Level Math : How to subtract variables
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Example Questions
Example Question #1 : How To Subtract Variables
Simplify:
Example Question #3 : Expressions & Equations
Simplify:
Example Question #4 : Expressions & Equations
Simplify:
This problem is just a matter of grouping together like terms. Remember that terms like 
The only part that might be a little hard is:
If you are confused, think of your number line. This is like "going back" (more negative) from 15. Therefore, you ranswer will be:
Example Question #144 : Ssat Middle Level Quantitative (Math)
Simplify:
This problem really is a trick question. There are no common terms among any of the parts of the expression to be simplified. In each case, you have an independent variable or set of variables: 
Example Question #2 : How To Subtract Variables
Simplify:
Remember, when there is a subtraction outside of a group, you should add the opposite of each member. That is:
That is a bit confusing, so let's simplify. When you add a negative, you subtract:
Now, group your like variables:
Finally, perform the subtractions and get:
Example Question #1 : How To Subtract Variables
Simplify:
Begin by rewriting the subtracted group as a set of added negative numbers:
Now, simplify that a little by rewriting the additions of negatives as being mere subtractions:
Next, move the like terms next to each other:
Finally, combine like terms:
Example Question #2 : How To Subtract Variables
Simplify:
You need to begin by distributing the minus sign through the whole group 
Simplifying the double negative, you get:
Now, you can move the like terms next to each other:
Finally, simplify:
Example Question #3 : How To Subtract Variables
Simplify:
This problem is as simple as it appears. All that you need to do is group together like terms:
The only like terms are the 
Example Question #4 : How To Subtract Variables
Simplify:
First, start by distributing the subtraction through the terms in parentheses. Note that you will be subtracting negative numbers:
Subtracting a negative is the same as adding a positive:
Now, group the like terms:
All you need to do now is combine like terms:
Example Question #7 : How To Subtract Variables
Simplify:
Begin by distributing the subtraction through the parentheses:
Next, group the like terms:
Now, combine them:
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