You would use inverse operations. I had this on my math homework and got it correct
so I know this!
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Good for you ! You know what you said, but you don't know what you know.
I'd say that you use the Golden Law: "You must always do exactly the same thing
to both sides of an equation."
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Isolate the variable
squared
In algebra, its to move the pieces of the equation around so that the variable is isolated to only one side of the sign
isolate the variable
That depends on the equation. In general, you'll try to isolate the variable, by using operations (on both sides of the equation) that get rid of anything other than the variable, on the side the variable is on.