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7 X − 5 8 X + 3 > 4 - Mathematics

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प्रश्न

\[\frac{7x - 5}{8x + 3} > 4\]

उत्तर

We have, 

\[\frac{7x - 5}{8x + 3} > 4\]
\[ \Rightarrow \frac{7x - 5}{8x + 3} - 4 > 0\]
\[ \Rightarrow \frac{7x - 5 - 4\left( 8x + 3 \right)}{8x + 3} > 0\]
\[ \Rightarrow \frac{7x - 5 - 32x - 12}{8x + 3} > 0\]
\[ \Rightarrow \frac{- 25x - 17}{8x + 3} > 0\]
\[ \Rightarrow \frac{25x + 17}{8x + 3} < 0 (\text{ Multiplying by - 1 to make the coefficient of x in the LHS hspace{0.167em} positive })\]

\[x \in \left( \frac{- 17}{25}, \frac{- 3}{8} \right)\]

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अध्याय 15: Linear Inequations - Exercise 15.1 [पृष्ठ १०]

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आरडी शर्मा Mathematics [English] Class 11
अध्याय 15 Linear Inequations
Exercise 15.1 | Q 27 | पृष्ठ १०

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