If (5 - 7x)/(8 + 3x) = -40/7, then what is the value of (2x + 3)/(x + 9) ?यदि (5 - 7x)/(8 + 3x) = -40/7 है, तो (2x + 3)/(x + 9) का मान क्या है ?

Explanation

Cross-multiplying: 7(5 - 7x) = -40(8 + 3x), so 35 - 49x = -320 - 120x, 71x = -355, x = -5. Then (2x + 3)/(x + 9) = (-10 + 3)/(-5 + 9) = -7/4.वज्र-गुणन से: 7(5 - 7x) = -40(8 + 3x), अतः 35 - 49x = -320 - 120x, 71x = -355, x = -5। तब (2x + 3)/(x + 9) = (-10 + 3)/(-5 + 9) = -7/4।