Ix+2/3I<(lub równe)4
I to wartośc bezwzględna:)
| x + 2/3 | ≤ 4
-4 ≤ x + 2/3 ≤ 4
-4 - 2/3 ≤ x ≤ 4 - 2/3
-4 i 2/3 ≤ x ≤ 3 i 1/3
odp. x ∈ <-4 i 2/3; 3 i 1/3>
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| x + 2/3 | ≤ 4
-4 ≤ x + 2/3 ≤ 4
-4 - 2/3 ≤ x ≤ 4 - 2/3
-4 i 2/3 ≤ x ≤ 3 i 1/3
odp. x ∈ <-4 i 2/3; 3 i 1/3>