x+2-(2x+1) ≤ 3
x+2-2x-1≤3
-x+1≤3
-x≤2
x≥-2
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x+2-(2x+1) ≤ 3
x+2-2x-1≤3
-x+1≤3
-x≤2
x≥-2
x+2-2x-1<=3
-x+1<=3
x>=-2
x+2-2x-1≤3
-x+1≤3
-x≤2
x≥-2
x∈<-2; +nieskończoności)