Algebra Intro Part 2
Algebra 100 Intro Algebra is a scary word, but really, it's just a fancy way of complicating the simple fact that a mathematical equation is unknown or incomplete. For example, we know that: 1 + 1 = 2. So therefore, if x = 1, then x + x = 2 because x is 1 and 1 + 1 = 2. That's easy. Let's try that again. 2 + 1 = 3 If a variable named y is equal to 1, then 2 + y = 3 because we defined the variable y to equal 1. Now what if we don't know one of the numbers, perhaps the 2. In that case, when we write the above equation, instead of a 2, we place a variable [D: a character representing a numeric value or number] in its place. Let's try it again. The variable p = 3 And the variable q is unknown But we know the following equation is true: p + p = q Then q must equal 6, right? Because p = 3, Then p + p = 3 + 3 = 6 Therefore, q = 6. Variables A variable is anything representing something else in mathematics or science. Computers, physics, engi