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x - 2⅕ ≤ ⅘ /\ x - 2⅕ ≥ -⅘
x ≤ 3 /\ x ≥ 1⅖
x ∈ <1⅖, 3>
f) |1⅔-x|≤ 1⅔
1⅔ - x ≤ 1⅔ /\ 1⅔ - x ≥ -1⅔
-x ≤ 0 /\ -x ≥ -3⅓
x ≥ 0 /\ x ≤ 3⅓
x ∈ <0, 3⅓>