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NCERT Class XI Mathematics - Linear Inequalities - Solutions

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Question : 20 of 65
Marks: +1, -0
x2\frac{x}{2}5x237x35\frac{5x-2}{3} - \frac{7x-3}{5}
Solution:  
The inequality is
x2\frac{x}{2}5x237x35\frac{5x-2}{3} - \frac{7x-3}{5}
Multiply each term by L.C.M. of 2, 3, 5, i.e., by 30
x2\frac{x}{2} × 30 ≥ 5x23×307x35\frac{5x-2}{3} \times 30 - \frac{7x-3}{5} × 30
or, 15x ≥ 10(5x – 2) – 6(7x – 3) or, 15x ≥ 50x – 20 – 42x + 18
or, 15x – 8x ≥ –2 or, 7x ≥ –2
Dividing both sides by 7, x ≥ − 27\frac{2}{7}
∴ The solution is [27,)[-\frac{2}{7},\infty)
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