Final answer:
The value of x has to be -1.
Step-by-step explanation:
The slope of a line can be determined using the formula:
slope = (change in y)/(change in x)
We know that one point on the line is (-5, 2) and another point is (x, -4). Plugging in these values into the formula:
(-4 - 2)/(x - (-5)) = 3/1
Simplifying the equation gives us:
-6/(x + 5) = 3
Multiplying both sides by (x + 5) gives us:
-6 = 3(x + 5)
Solving for x gives us:
x = -1