Answer: -2
Explanation:
First you begin by taking 3 and multiplying is by 14 and -5x:
(3 X 14) - (3 X -5x) = 72
42 - 15x = 72
Next, you subtract 42 from each side to isolate the variable.
-15x = 30
Next you divide each side by -15 to get the value of x.
X = -2
I hope this helps!