phi=45*30-20*25/65*55*50*70 eching

$$\phi = \frac{ 45 \cdot 30-20 \cdot 25 }{ 65 \cdot 55 \cdot 50 \cdot 70 }$$

ϕ uchun yechish

$$ϕ=\frac{17}{250250}\approx 0,000067932$$

Chiziqli tenglamalarni yechish bo'yicha qadamlar

1350 hosil qilish uchun 45 va 30 ni ko'paytirish.

$$ϕ=\frac{1350-20\times 25}{65\times 55\times 50\times 70}$$

500 hosil qilish uchun 20 va 25 ni ko'paytirish.

$$ϕ=\frac{1350-500}{65\times 55\times 50\times 70}$$

850 olish uchun 1350 dan 500 ni ayirish.

$$ϕ=\frac{850}{65\times 55\times 50\times 70}$$

3575 hosil qilish uchun 65 va 55 ni ko'paytirish.

$$ϕ=\frac{850}{3575\times 50\times 70}$$

178750 hosil qilish uchun 3575 va 50 ni ko'paytirish.

$$ϕ=\frac{850}{178750\times 70}$$

12512500 hosil qilish uchun 178750 va 70 ni ko'paytirish.

$$ϕ=\frac{850}{12512500}$$

\frac{850}{12512500} ulushini 50 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$ϕ=\frac{17}{250250}$$

ϕ'ni tayinlash

$$ϕ≔\frac{17}{250250}$$