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3x+4\geq 0 5-x<0
For the quotient to be ≤0, one of the values 3x+4 and 5-x has to be ≥0, the other has to be ≤0, and 5-x cannot be zero. Consider the case when 3x+4\geq 0 and 5-x is negative.
x>5
滿足兩個不等式的解為 x>5。
3x+4\leq 0 5-x>0
Consider the case when 3x+4\leq 0 and 5-x is positive.
x\leq -\frac{4}{3}
滿足兩個不等式的解為 x\leq -\frac{4}{3}。
x>5\text{; }x\leq -\frac{4}{3}
最終解是所取得之解的聯集。