-2y=-1;2x-y=7? eching

$$- 2 y = - 1 ; 2 x - y = 7 ?$$

y, x uchun yechish

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

$$y=\frac{1}{2}=0,5$$

Yechim qadamlari

Birinchi tenglamani yeching. Ikki tarafini -2 ga bo‘ling.

$$y=\frac{-1}{-2}$$

Ikkala surat va maxrajdan manfiy belgini olib tashlash bilan \frac{-1}{-2} kasrini \frac{1}{2} ga soddalashtirish mumkin.

$$y=\frac{1}{2}$$

Ikkinchi tenglamani yeching. Tenglamaga o‘zgaruvchining ma’lum qiymatlarini joylang.

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

\frac{1}{2} ni ikki tarafga qo’shing.

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

\frac{15}{2} olish uchun 7 va \frac{1}{2}'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.

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

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

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

Tizim hal qilindi.

$$y=\frac{1}{2} x=\frac{15}{4}$$