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Math Lessons



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Mon Nov 25, 2013 5:24 am
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Pamplemousse says...



MY FIRST MATH LESSON <3

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Alright, time for your lesson in Simple Equations! :D

Let me start off by breaking down the components of a simple equation.

Take for example, 4x + 5 = 13. The 4 is called the coefficient, which means the number(s) that multiplies the x (or any other letter a-z), which is called a variable, which means a number that is not yet known. The + is called an operator, which can be +,-,*(multiply), or /. The 5 and 13 are called constants, which are numbers that stand alone. (They're so lonely!).

Anyways... A simple equation is a monomial (take for example, 4x) and a constant (5) that are added, subtracted, multiplied, or divided with/by each other, that equal another constant (13). The variable has to equal a certain number or else the equation will be incorrect.

For example, with 4x + 5 = 13, x would have to equal 2 because 4*2=8 and 8+5=13.

So, how did I get to x=2? I'm going to tell you. c:

Once again, take for example 4x + 5 = 13. The first thing you would do is subtract 5 from 5 and 5 from 13, which would give you 4x = 8. Next, you would divide 4x by 4 and 8 by 4, which gives you x = 2.

To check your answer, you plug in what you got for x into wherever you see an x. So, for 4x + 5 = 13, you would plug in 2 for x, which would give you 4(2) + 5 = 13, which would give you 8 + 5 = 13, which gives you 13 = 13!

Something to remember: If it were to be 4x - 5 = 13, you would add 5 to 13, if it were to be 4x * 5 = 13, you would divide 13 by 5 (which gives you like... 2.6), and if it were to be 4x / 5 = 13, you would multiply 13 by 5.

That's basically it! Time for some examples!

Example 1: ~~~ Check 1:
5x - 2 = 18 ~~~ 5(4) - 2 = 18
Add 2 to 18 ~~ 20 - 2 = 18
5x = 20 ~~~~~~ 18 = 18
Divide by 5
x = 4

Example 2: ~~~~~ Check 2:
3x / 4 = 6 ~~~~~~ 3(8) / 4 = 6
Multiply 6 by 4 ~~ 24 / 4 = 6
3x = 24 ~~~~~~~~ 6 = 6
Divide 24 by 3
x = 8

I really hope this helped!

Love,
~Lati
“Admire my gaytime in the mist of purple~” -lostthought, 2015.
~~~~~~~~~~~Usernames~~~~~~~~~~~
Pamplemousse (4/16/14-Now)
Lateritic (8/21/13-4/16/14)
Kittyz101 (3/11/13-8/21/13)
  








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