Réitigh {l}{b=4a}{4a+8a+c=-4}{a-4a+c=5}

$$\left\{ \begin{array} { l } { b = 4 a } \\ { 4 a + 8 a + c = - 4 } \\ { a - 4 a + c = 5 } \end{array} \right.$$

Réitigh do b,a,c.

$$b = -\frac{12}{5} = -2\frac{2}{5} = -2.4$$

$$a=-\frac{3}{5}=-0.6$$

$$c = \frac{16}{5} = 3\frac{1}{5} = 3.2$$

Céimeanna gearra ag baint úsáid as ionadú

Réitigh an dara cothromóid do a agus an tríú cothromóid do c.

$$a=-\frac{1}{12}c-\frac{1}{3} c=3a+5$$

Cuir -\frac{1}{12}c-\frac{1}{3} in ionad a sa chothromóid c=3a+5.

$$c=3\left(-\frac{1}{12}c-\frac{1}{3}\right)+5$$

Réitigh c=3\left(-\frac{1}{12}c-\frac{1}{3}\right)+5 do c.

$$c=\frac{16}{5}$$

Cuir \frac{16}{5} in ionad c sa chothromóid a=-\frac{1}{12}c-\frac{1}{3}.

$$a=-\frac{1}{12}\times \frac{16}{5}-\frac{1}{3}$$

Ríomh a ó a=-\frac{1}{12}\times \frac{16}{5}-\frac{1}{3}.

$$a=-\frac{3}{5}$$

Cuir -\frac{3}{5} in ionad a sa chothromóid b=4a.

$$b=4\left(-\frac{3}{5}\right)$$

Ríomh b ó b=4\left(-\frac{3}{5}\right).

$$b=-\frac{12}{5}$$

Tá an córas réitithe anois.

$$b=-\frac{12}{5} a=-\frac{3}{5} c=\frac{16}{5}$$