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-8<1/3x+4<8
1/3x+4>-8 lub 1/3x+4<8
1/3 x>-12 lub 1/3x<4
x>-36 lub x<12
x∈(-36,12)
Zatem
⅓x+4 <8 i ⅓x+4 > -8
⅓x < 4 i ⅓x > -12
x < 12 i x > -36
x∈(-36, 12)
1/3x+4<8 i 1/3x+4>-8
otrzymujemy:
1/3x<4 i 1/3x>-12
x<12 x> -36
xc(-36,12)