1-×<3×+2≤7
1-x<3x+2 i 3x+2<= 7
4x>-1 i 3x<=5
x>-1/4 i x<=5/3
Odp. x należy do (-1/4;5/3>
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1-x<3x+2 i 3x+2<= 7
4x>-1 i 3x<=5
x>-1/4 i x<=5/3
Odp. x należy do (-1/4;5/3>