Question
Draw the graph of the following linear equations in two variables:
x + y = 4

Answer

We have,
x + y = 4
⇒ x = 4 - y ...(i)
Putting y = 0, we get x = 4 - 0 = 4
Putting y = 3, we get x = 4 - 3 = 1
Thus, we have the following table giving two points on the line represented by the equation x + y = 4:
Graph of the equation x + y = 4:

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