Question

hallar la siguiente ecuaciones ​

Answer 1

$\frac{2x - 9}{3} = \frac{3x + 4}{12} \\ 12 \times \frac{2x - 9}{3} = 12 \times \frac{3x + 4}{12} \\ 4(2x - 9) = 3x + 4 \\ 8x - 36 = 3x + 4 \\ 8x - 3x = 4 + 36 \\ 5x = 40 \\ x = 8$