r=2pir/d eching

$$r = \frac { 2 \pi r } { d }$$

d uchun yechish

$$\left\{\begin{matrix}\\d=2\pi \approx 6,283185307\text{, }&\text{unconditionally}\\d\neq 0\text{, }&r=0\end{matrix}\right,$$

Chiziqli tenglamalarni yechish bo'yicha qadamlar

d qiymati 0 teng bo‘lmaydi, chunki nolga bo‘lish mumkin emas. Tenglamaning ikkala tarafini d ga ko'paytirish.

$$rd=2\pi r$$

Ikki tarafini r ga bo‘ling.

$$\frac{rd}{r}=\frac{2\pi r}{r}$$

r ga bo'lish r ga ko'paytirishni bekor qiladi.

$$d=\frac{2\pi r}{r}$$

2\pi r ni r ga bo'lish.

$$d=2\pi$$

d qiymati 0 teng bo‘lmaydi.

$$d=2\pi \text{, }d\neq 0$$

r uchun yechish

$$\left\{\begin{matrix}r=0\text{, }&d\neq 0\\r\in \mathrm{R}\text{, }&d=2\pi \end{matrix}\right,$$

Chiziqli tenglamalarni yechish bo'yicha qadamlar

Ikkala tarafdan \frac{2\pi r}{d} ni ayirish.

$$r-\frac{2\pi r}{d}=0$$

Ifodalarni qo‘shish yoki ayirish uchun ularni yoyib, maxrajlarini bir xil qiling. r ni \frac{d}{d} marotabaga ko'paytirish.

$$\frac{rd}{d}-\frac{2\pi r}{d}=0$$

\frac{rd}{d} va \frac{2\pi r}{d} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$\frac{rd-2\pi r}{d}=0$$

rd-2\pi r ichidagi ko‘paytirishlarni bajaring.

$$\frac{rd-2r\pi }{d}=0$$

Tenglamaning ikkala tarafini d ga ko'paytirish.

$$rd-2r\pi =0$$

r'ga ega bo'lgan barcha shartlarni birlashtirish.

$$\left(d-2\pi \right)r=0$$

0 ni -2\pi +d ga bo'lish.

$$r=0$$