4(3-5b)=87 eching

$$4 ( 3 - 5 b ) = 87$$

b uchun yechish

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

Chiziqli tenglamalarni yechish bo'yicha qadamlar

Ikki tarafini 4 ga bo‘ling.

$$3-5b=\frac{87}{4}$$

Ikkala tarafdan 3 ni ayirish.

$$-5b=\frac{87}{4}-3$$

3 ni \frac{12}{4} kasrga o‘giring.

$$-5b=\frac{87}{4}-\frac{12}{4}$$

\frac{87}{4} va \frac{12}{4} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$-5b=\frac{87-12}{4}$$

75 olish uchun 87 dan 12 ni ayirish.

$$-5b=\frac{75}{4}$$

Ikki tarafini -5 ga bo‘ling.

$$b=\frac{\frac{75}{4}}{-5}$$

\frac{\frac{75}{4}}{-5} ni yagona kasrga aylantiring.

$$b=\frac{75}{4\left(-5\right)}$$

-20 hosil qilish uchun 4 va -5 ni ko'paytirish.

$$b=\frac{75}{-20}$$

\frac{75}{-20} ulushini 5 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

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