19/(1/4) = (-3 1/6)x / (-1 1/2)
19 * (4/1) = (-19/6)x / (-3/2)
76 = (19/6)x * (-2/3)
a 2 cancels out of the 2 and the 6
76 = (19/3)x * (-1/3)
76 = (-19/9)x
76 / (-19/9) = x
76 * (-9/19) = x
a 19 cancels out of the 76 and the 19
4 * (-9/1) = x
-36 = x
Answer: x = -36