Answer :

RickyChen
x intercept : (4,0)

y intercept: (0, -4)
mathmate
To find the x-intercept, set  y=0 to get x-0=4  => x=4 as the x-intercept.
Similarly,
To find the y-intercept, set  x=0 to get 0-y=4  => y=-4 as the y-intercept.

This works for all linear equations in two unknowns.

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