how to do some problems with linear equations in one varible

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ZachI'm not sure exactly what applications you are asking about, but I do know that linear equations of one variable are things like y = 4 or like x = 7. Linear equations in two variables are things like 3x + 2y = 12This is just a relationship between the values of x and y. Combinations of (x,y) that, when substituted into the linear equation, create true statements are all in the same line on a graph. You might see this as a "diagonal" line.Linear equations in one variable represent either horizontal or vertical lines.If the equation is y = some value, it represents a horizontal line.If the equation is x = some value, it represents a vertical line.