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Question 504341: What is the main thing I need to remember when I am solving equation problems. I have a test coming up on this tomorrow and I really really need some help.
Answer by jim_thompson5910(35256)   (Show Source):
You can put this solution on YOUR website! The basic thing you need to remember is that when solving equations, you're following PEMDAS in reverse to isolate the variable.
So normally, you'd use PEMDAS to get
2*3+5 = 11
But say that the '3' was really an x, so we now have
2x+5 = 11
Now follow PEMDAS in reverse (ie undo addition/subtraction, then undo multiplication/division, etc) to get
2x+5 - 5 = 11 - 5
2x+0 = 6
2x = 6
x = 6/2
x = 3
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