Question

if (x-9) : (3x+6) is the duplicate ratio of 4:9 , find x​

Answer 1

Step-by-step explanation:

$\frac{x - 9}{3x + 6} = \frac{4}{9} \ \\ \\ 9(x - 9) = 4(3x + 6) \\ \\ 9x - 81 = 12x + 24 \\ \\ - 81 - 24 = 12x - 9x \\ \\ - 105 = 3x \\ \\ x = \frac{ - 105}{3} \\ \\ x = - 35$