21-[5x-(3x-1)]=5x-12 eching

$$21 - [ 5 x - ( 3 x - 1 ) ] = 5 x - 12$$

x uchun yechish

$$x = \frac{32}{7} = 4\frac{4}{7} \approx 4,571428571$$

Chiziqli tenglamalarni yechish bo'yicha qadamlar

3x-1 teskarisini topish uchun har birining teskarisini toping.

$$21-\left(5x-3x-\left(-1\right)\right)=5x-12$$

-1 ning teskarisi 1 ga teng.

$$21-\left(5x-3x+1\right)=5x-12$$

2x ni olish uchun 5x va -3x ni birlashtirish.

$$21-\left(2x+1\right)=5x-12$$

2x+1 teskarisini topish uchun har birining teskarisini toping.

$$21-2x-1=5x-12$$

20 olish uchun 21 dan 1 ni ayirish.

$$20-2x=5x-12$$

Ikkala tarafdan 5x ni ayirish.

$$20-2x-5x=-12$$

-7x ni olish uchun -2x va -5x ni birlashtirish.

$$20-7x=-12$$

Ikkala tarafdan 20 ni ayirish.

$$-7x=-12-20$$

-32 olish uchun -12 dan 20 ni ayirish.

$$-7x=-32$$

Ikki tarafini -7 ga bo‘ling.

$$x=\frac{-32}{-7}$$

Ikkala surat va maxrajdan manfiy belgini olib tashlash bilan \frac{-32}{-7} kasrini \frac{32}{7} ga soddalashtirish mumkin.

$$x=\frac{32}{7}$$