#Inequalities

3 messages · Page 1 of 1 (latest)

ripe turtle
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(5x+8/4-x)<2
Multiple both sides by (4-x)
5x+8<8-2x
Simplifying the inequation we get--->
x<0

Another way to solve this-->
(5x+8/4-x)-2<0 (bring 2 to LHS and change sign)
5x+8-8+2x/4-x<0
After solving we get-->
7x/x-4>0
By solving this on a real number line we get-->
x∈]-infinity,0[ union ]4,infinity[

Acc to the solution in book the latter is correct answer but why? Why didn't the former method work? We don't get the value of x satisfying the inequality for the denominator that's why?

quaint jewelBOT
ripe turtle
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Sorry for the formatting idk how to do latex