Answer:
6
Step-by-step explanation:
V/2 - 21 = -15
V/2 - 21 + 21 = -15 + 21
V/2 + 0 = 6
V/2 * 2 = 6 * 2
V = 12
(61. 8181..., ~)
-11/5x<-136
x>680/11
x>61. 8181...
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