(12x+3y)-(12x-20y)=15-81 eching

$$( 12 x + 3 y ) - ( 12 x - 20 y ) = 15 - 81$$

y uchun yechish

$$y = -\frac{66}{23} = -2\frac{20}{23} = -2,869565217391304$$

Chiziqli tenglamalarni yechish bo'yicha qadamlar

12x-20y teskarisini topish uchun har birining teskarisini toping.

$$12x+3y-12x+20y=15-81$$

0 ni olish uchun 12x va -12x ni birlashtirish.

$$3y+20y=15-81$$

23y ni olish uchun 3y va 20y ni birlashtirish.

$$23y=15-81$$

-66 olish uchun 15 dan 81 ni ayirish.

$$23y=-66$$

Ikki tarafini 23 ga bo‘ling.

$$y=\frac{-66}{23}$$

\frac{-66}{23} kasri manfiy belgini olib tashlash bilan -\frac{66}{23} sifatida qayta yozilishi mumkin.

$$y=-\frac{66}{23}$$

x uchun yechish (complex solution)

$$x\in \mathrm{C}$$

$$y = -\frac{66}{23} = -2\frac{20}{23} = -2,869565217391304$$

x uchun yechish

$$x\in \mathrm{R}$$

$$y = -\frac{66}{23} = -2\frac{20}{23} = -2,869565217391304$$