956) -4x-1<0⇔4x+1>0, 
-\frac{1}{4}" alt="x>-\frac{1}{4}" align="absmiddle" class="latex-formula">
957)-2x-9<0⇔2x+9>0, 
-\frac{9}{2}" alt="x>-\frac{9}{2}" align="absmiddle" class="latex-formula">
958)-10x-8<0⇔10x+8>0, 
-\frac{4}{5}" alt="x>-\frac{4}{5}" align="absmiddle" class="latex-formula">
959)-10x-1<0⇔10x+1>0, 
-\frac{1}{10}" alt="x>-\frac{1}{10}" align="absmiddle" class="latex-formula">