They are all the pairs you make where (x = any number) and (y = 4).
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There are an infinite number of ordered pairs. Any point on the straight line which passes through (0,4) and has a gradient of -2 will be an ordered pair for the equation.
(-1, -5), (0, -2), (1, 1), (2, 4), (356, 1066)
4
3x + 4y = -4 defines a line in 2-dimensional space and the coordinates of every point on the line is an ordered pair that satisfies the equation. I have neither the time nor the inclination to list an infinite number of ordered pairs.
x = 4 and y = 7