Math for School

Description

An equation is a statement of equality. When we write, A = B, we mean that A is equal to B. Since these letters represent numbers, we are saying, the magnitude of A is equal to the magnitude of B. Example: 25 = 25 true enough, 25 does equal 25. But, what is more important, is the operations we can perform to the equation, maintaining equality at all times, allowing us to "solve" for an unknown. In this example A is 25, and B is 25. (Note: A = B can be written B = A) say we add 10 to A. Well, 25 + 10 is 35. To maintain equality, we must also add 10 to B. This equation becomes: 35 = 35 In other words, if we add 10 to A, we must ALSO add 10 to B, if we do not, our equation becomes 35 = 25, which we know is incorrect, we would say 35 does not equal 25 and we would write this fact this way: 35

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