Question

Ecuacion lineal 2x + 3 - (2 - x) = -(1 - 4x)

Answer 1

Respuesta:

$2x + 3 - (2 - x) = - (1 - 4x) \\ 2x + 3 - 2 + x = - 1 + 4x \\ 3x + 1 = - 1 + 4x \\ 3x - 4x = - 1 - 1 \\ - 1x = - 2 \\ x = 2 \: \\ comprobamos \\ 2 \times 2 + 3 - (2 - 2) = - (1 - 4 \times 2) \\ 4 + 3 - 0 = - (1 - 8) \\ 7 = - ( - 7) \\ 7 = 7$