How to solve and check equations

Solving equations is pretty easy to do, but sometimes people get confused. The main rule of equations is, whatever you do to one side of the = sign you do to the other. Say you had 4xb=2o, since you are multiplying you want to divide. Then you do 4/4=0, whatever you do to one side do to the other, 20/4=5. 5+0=5, so 5 is your answer. An equation is something that has 2 numbers, an operation, an equal sign, and a variable. Checking your answer is very easy. All you do is this: First, you rewrite the problem,4xb=20. Then plug the answer into the equation,4x5=20. Next, do the problem, 20=20. Lastly, if the 2 numbers are the same put the variable = the number, b=5.http://www.teacherschoice.com.au/Maths_Library/Algebra/Alg_21.htm

Factors and GCF

Factors are a number that goes evenly into another number like 8 goes into 16 so 8 is the factor. How to find factors is really simple you just get a random number like 36 then check if it is even, which 36 is, that means that one factor of that number is 2. The way to find more factors of that number is doing that number divided by other numbers and by itself so you would get 36, 18, 12, 9, 6, 4, 3, and 2. Now, to do GCF you need 2 numbers,21,36, then you find the factors of both and compare them.The highest number in both of the columns is your GCF. Examples