1. Ask yourself what is being done to the variable(addition, subtraction, multiplication, division)?
2. Then you do the inverse operation to both sides of the equation( whatever you do to one side you must do to the other).
3. Finally the variable you got from doing inverse operations should equal the variable.
Ex: 5+x=19
-5 -5
x=14
x=14
How to check equations
1. First you rewrite the equation. 5+x=19
2. Then, you plug in the variable. 5+14=19
3. Thirdly, you should do all the operations. 5+14=19
19 = 19
4. Lastly, you should get what the variable equals x=14
Vocabulary
Equation- two numbers that have the same value
Variable-a letter that represents a number
Inverse operations-an operation that is the opposite of what is being done to the variable. So, if it is addition then you do subtraction, and if it is multiplication then you divide.
Need help?
Go to...
http://www.themathpage.com/alg/algebraic-expressions.htm
2. Then, you plug in the variable. 5+14=19
3. Thirdly, you should do all the operations. 5+14=19
19 = 19
4. Lastly, you should get what the variable equals x=14
Vocabulary
Equation- two numbers that have the same value
Variable-a letter that represents a number
Inverse operations-an operation that is the opposite of what is being done to the variable. So, if it is addition then you do subtraction, and if it is multiplication then you divide.
Need help?
Go to...
http://www.themathpage.com/alg/algebraic-expressions.htm
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