Question

×+2×+3-5×=4×-9 por favor

Answer 1

$x + 2x - 5x - 4x = - 9 - 3 \\ 3x - 9x = - 12 \\ - 6x = - 12 \: \: \: \: \: \times ( - 1) \\ 6x = 12 \\ x = \frac{12}{6} \\ x = 2$