Solve the given inequality for real x: 3(2 – x) ≥ 2(1 – x)
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3(2 – x) ≥ 2(1 – x) ⇒ 6 – 3x ≥ 2 – 2x ⇒ 6 – 3x + 2x ≥ 2 – 2x + 2x ⇒ 6 – x ≥ 2 ⇒ 6 – x – 6 ≥ 2 – 6 ⇒ –x ≥ –4 ⇒ x ≤ 4 Thus, all real numbers x, which are less than or equal to 4, are the solutions of the given inequality. Hence, the solution set of the given inequality is (–∞, 4].
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Solution :-
Given that, 3 (2 – x) ≥ 2 (1 – x)
By multiplying we get
6 – 3x ≥ 2 – 2x
Now by adding 2x to both the sides,
6 – 3x + 2x ≥ 2 – 2x + 2x
6 – x ≥ 2
Again by subtracting 6 from both the sides, we get
6 – x – 6 ≥ 2 – 6
– x ≥ – 4
Multiplying throughout inequality by negative sign we get
x ≤ 4
∴ The solutions of the given inequality are defined by all the real numbers greater than or equal to 4.
Hence the required solution set is (- ∞, 4]
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