Tylko 2 przykłady ( ''b'' i ''d'')
b)
3(2-x) ≤ -⅔(6x-21)
6-3x ≤ -4x-14 / +3x
6 ≤ -x - 14 / + 14
20 ≤ -x
d)
1 = (2x-5)/3 < 3 / *3
3 = 2x-5 < 9 / +5
8 = 2x < 9 / -8
2x - 8 < 1 / +8
2x < 9 / :2
x < 4,5
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b)
3(2-x) ≤ -⅔(6x-21)
6-3x ≤ -4x-14 / +3x
6 ≤ -x - 14 / + 14
20 ≤ -x
d)
1 = (2x-5)/3 < 3 / *3
3 = 2x-5 < 9 / +5
8 = 2x < 9 / -8
2x - 8 < 1 / +8
2x < 9 / :2
x < 4,5