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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

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Q: Which line represents 5x plus 4y equals 20?
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