수식 9: "y" greater than or equal to 16 left brace, 10 greater than or equal to "x" greater than or equal to negative 10 , right brace left brace, "y" less than or equal to 18 , right bracey≥1610≥x≥−10y≤18
9
수식 10: "y" greater than or equal to 18 left brace, 10 greater than or equal to "x" greater than or equal to negative 10 , right brace left brace, "y" less than or equal to 20 , right bracey≥1810≥x≥−10y≤20
10
수식 11: "y" greater than or equal to 20 left brace, 10 greater than or equal to "x" greater than or equal to negative 10 , right brace left brace, "y" less than or equal to 22 , right bracey≥2010≥x≥−10y≤22
11
수식 12: "y" greater than or equal to 22 left brace, 10 greater than or equal to "x" greater than or equal to negative 10 , right brace left brace, "y" less than or equal to 24 , right bracey≥2210≥x≥−10y≤24
12
수식 13: "y" greater than or equal to 24 left brace, 10 greater than or equal to "x" greater than or equal to negative 10 , right brace left brace, "y" less than or equal to 26 , right bracey≥2410≥x≥−10y≤26
13
수식 14: "x" less than or equal to negative 10 left brace, 26 greater than or equal to "y" greater than or equal to 10 , right brace left brace, "x" greater than or equal to negative 30 , right bracex≤−1026≥y≥10x≥−30
14
수식 15: "x" greater than or equal to negative 30 left brace, 0 greater than or equal to "y" greater than or equal to negative 20 , right brace left brace, "x" less than or equal to negative 28 , right bracex≥−300≥y≥−20x≤−28
15
수식 16: "x" equals negative 28 left brace, 0 greater than or equal to "y" greater than or equal to negative 20 , right bracex=−280≥y≥−20
16
수식 17: "y" equals negative 20 left brace, negative 28 greater than or equal to "x" greater than or equal to negative 30 , right bracey=−20−28≥x≥−30
