Answer :

Given:


.


Subtracting both the sides by 2






Now dividing both the sides by 7




Signs of x:


x = 0


x < 0


x > 0


Signs of 4 – x:


4 – x = 0 x = 4


(Subtracting 4 from both the sides, then dividing by -1 on both the sides)


4 – x < 0 x > 4


(Subtracting 4 from both the sides, then multiplying by -1 on both the sides)


4 – x > 0 x < 4


(Subtracting 4 from both the sides, then multiplying by -1 on both the sides)


At x = 4, is not defined


Intervals satisfying the condition: < 0


x < 0 or x > 4


Therefore,


x є (-∞, 0) υ (4, ∞)


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