Resolver {l}{2300x+100y-200z=46}{100x+1500y+1000z=58}{-200x+1000y+3200z=-9}

$$\left. \begin{array} { l } { 2300 x + 100 y - 200 z = 46 } \\ { 100 x + 1500 y + 1000 z = 58 } \\ { - 200 x + 1000 y + 3200 z = - 9 } \end{array} \right.$$

Resolver x, y, z

$$x=\frac{1763}{107600}\approx 0.016384758$$

$$y=\frac{5269}{107600}\approx 0.048968401$$

$$z=-\frac{1839}{107600}\approx -0.017091078$$

Pasos breves que usan substitución

Despexa x en 2300x+100y-200z=46.

$$x=\frac{1}{50}-\frac{1}{23}y+\frac{2}{23}z$$

Substitúe \frac{1}{50}-\frac{1}{23}y+\frac{2}{23}z por x na segunda e na terceira ecuación.

$$100\left(\frac{1}{50}-\frac{1}{23}y+\frac{2}{23}z\right)+1500y+1000z=58 -200\left(\frac{1}{50}-\frac{1}{23}y+\frac{2}{23}z\right)+1000y+3200z=-9$$

Despexa y e z respectivamente nestas ecuacións.

$$y=\frac{161}{4300}-\frac{29}{43}z z=-\frac{23}{14640}-\frac{58}{183}y$$

Substitúe y por \frac{161}{4300}-\frac{29}{43}z na ecuación z=-\frac{23}{14640}-\frac{58}{183}y.

$$z=-\frac{23}{14640}-\frac{58}{183}\left(\frac{161}{4300}-\frac{29}{43}z\right)$$

Despexa z en z=-\frac{23}{14640}-\frac{58}{183}\left(\frac{161}{4300}-\frac{29}{43}z\right).

$$z=-\frac{1839}{107600}$$

Substitúe z por -\frac{1839}{107600} na ecuación y=\frac{161}{4300}-\frac{29}{43}z.

$$y=\frac{161}{4300}-\frac{29}{43}\left(-\frac{1839}{107600}\right)$$

Calcular y tendo en conta que y=\frac{161}{4300}-\frac{29}{43}\left(-\frac{1839}{107600}\right).

$$y=\frac{5269}{107600}$$

Substitúe \frac{5269}{107600} por y e -\frac{1839}{107600} por z na ecuación x=\frac{1}{50}-\frac{1}{23}y+\frac{2}{23}z.

$$x=\frac{1}{50}-\frac{1}{23}\times \frac{5269}{107600}+\frac{2}{23}\left(-\frac{1839}{107600}\right)$$

Calcular x tendo en conta que x=\frac{1}{50}-\frac{1}{23}\times \frac{5269}{107600}+\frac{2}{23}\left(-\frac{1839}{107600}\right).

$$x=\frac{1763}{107600}$$

O sistema xa funciona correctamente.

$$x=\frac{1763}{107600} y=\frac{5269}{107600} z=-\frac{1839}{107600}$$