Question 1144798
<br>
{{{1/(x-1)<5}}}<br>
Solution strategy: multiply both sides by (x-1) to clear fractions.<br>
Case 1: x-1 < 0 (i.e., x < 1)<br>
If x < 1, (x-1) is negative, so multiplying by (x-1) reverses the direction of the inequality.<br>
{{{1 > 5x-5}}}
{{{6 > 5x}}}
{{{5x < 6}}}
{{{x < 6/5}}}<br>
So if x < 1, an "additional" restriction is that x < 6/5.  But ALL values of x that are less than 1 are less than 6/5.  So all numbers less than 1 are part of the solution set.<br>
Case 2: x-1 > 0 (i.e., x > 1)<br>
If x > 1, (x-1) is positive, so multiplying by (x-1) does not change the direction of the inequality.<br>
{{{1 < 5x-5}}}
{{{6 < 5x}}}
{{{6/5 < x}}}
{{{x > 6/5}}}<br>
So if x > 1, the additional restriction is that x > 6/5.  So the other part of the solution set is all the number greater than 6/5 = 1.2.<br>
Final solution set: (-infinity, 1) union (1.2, infinity)