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7,2/0,9 > n+8,6
8 > n+8,6
n > 8-8,6
n > -0,6
h. 20 ≥ -3,2(c-4,3)
20 ≥ -3,2c + 13,76
20 - 13,76 ≥ -3,2c
6,24 ≥ -3,2c
-3,2c ≤ 6,24
c ≥ 6,24/-3,2
c ≥ -1,95
i. 15 - 8x > 40 - 13x
-8x +13x > 40-15
5x > 25
x > 25/5
x > 5
j. -3(2x-1) +2x < 7 - (2x-1)
-6x+3 + 2x < 7 -2x +1
-6x+2x+2x < 7 +1 -3
-2x < 5
x > 5/-2
x > -2½