g +14 = 29
20 = 5i
10 = s (-2)
19 = r + 7
5 = c -13
g - 13 = 8
20 = a + 5
-42 = g (-6)
-2a = -14
y + 11 = 22
15 = h -15
2 i = -6
23 = f + 13
n(-2) = 4