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Q: What is the same about expressions and equations?

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They are the same except equations use the equal sign =

In the same way that you would solve equations because equivalent expressions are in effect equations

expressions don't have an equal sign and equations do

Equations are made from expressions.

Inequalities and equations are both the same because they are both mathematical expression and they both use the same steps EXCEPT for the end. Inequalities and equations are both different because equations have an equal sign, the answer is not an interval, and the answer is a specific answer. Not a range. While inequalities don't have an equal sign, its answer is an interval, and it's answer is in a range.

They can but don't have to.

no algebraic expressions do not have equal signs but equations do.

These are two expressions, not equations. Expressions do not have solutions, only equations do. NB equations include the equals sign.

It may be possible to solve equations. Expressions cannot be solved until they are converted, with additional information, into equations or inequalities which may have solutions.

Equations are said to be equivalent if they have the same solution. This definition also holds true in rational equations or equations involving rational expressions. For instance, the equations 2x = 14 and x - 3 = 4 are equivalent. Why? It's because they have the same solution, that is x = 7.

They are called: Identical equations or IdentitiesSee: http://www.tutorvista.com/search/value-algebraic-expressions-33 - -7 = ss = -26

If both equations can be simplified to the same value, they are equal.