n - 8 = 5
n = 13
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The answer is x = 5. By rearranging the equation, we can isolate the variable x. Subtracting 3x from both sides gives us 5 = x.
It is an equation in a single variable, x.
It is an equation in the variable r.
5x+4y=20 is technically the equation of a line. A more familiar representation of the line is in "y equals" notation. This simply means that the y variable has been isolated (this notation is usually required for graphing calculators). To get the equation in y equals notation, simply isolate the y variable: 5x+4y=20 4y=(-5)x+20 y=((-5)x+20)/4
It is a linear equation in one variable, x.