3x-5x-1/2=7 eching

$$3 x - 5 x - \frac { 1 } { 2 } = 7$$

x uchun yechish

$$x = -\frac{15}{4} = -3\frac{3}{4} = -3,75$$

Chiziqli tenglamalarni yechish bo'yicha qadamlar

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

$$-2x-\frac{1}{2}=7$$

\frac{1}{2} ni ikki tarafga qo’shing.

$$-2x=7+\frac{1}{2}$$

7 ni \frac{14}{2} kasrga o‘giring.

$$-2x=\frac{14}{2}+\frac{1}{2}$$

\frac{14}{2} va \frac{1}{2} da bir xil maxraji bor, ularning suratini qo‘shish orqali qo‘shing.

$$-2x=\frac{14+1}{2}$$

15 olish uchun 14 va 1'ni qo'shing.

$$-2x=\frac{15}{2}$$

Ikki tarafini -2 ga bo‘ling.

$$x=\frac{\frac{15}{2}}{-2}$$

\frac{\frac{15}{2}}{-2} ni yagona kasrga aylantiring.

$$x=\frac{15}{2\left(-2\right)}$$

-4 hosil qilish uchun 2 va -2 ni ko'paytirish.

$$x=\frac{15}{-4}$$

\frac{15}{-4} kasri manfiy belgini olib tashlash bilan -\frac{15}{4} sifatida qayta yozilishi mumkin.

$$x=-\frac{15}{4}$$