SOLUTION: I Am really struggling on solving linear equations with substitution and elimination. could you help me out and tell me the most easiest way to do these

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Question 538697: I Am really struggling on solving linear equations with substitution and elimination. could you help me out and tell me the most easiest way to do these
Answer by JLB(8) About Me  (Show Source):
You can put this solution on YOUR website!
This is an example of a linear equation : 2x + 4 = 10
2x + 4 = 10
The goal is to find what X is equal to, your final answer is X = (answer)
The first step in solving this equation is to subtract 4 from both sides. (Remember that what you do to one side you must do to both sides).
2x + 4 - 4 = 10 - 4
2x = 6
Now you just need to divide both sides by 2, and you will get the final answer:
x = 3
Let's do another one.
+x%2F3+-+12+=+36+
+x%2F3+-+12+%2B+12+=+36+%2B+12+
+x%2F3+=+48+
+x+=+16+
Do you see that? You need to do the opposite operation (subtracting and adding are opposite, division and multiplication are opposite) to both sides. So when you see x - 1 = 12, you know to add 1 to 12 to get 13, and to cancel out the x + 1 to get simply x. x = 13.