a/4-b/5=4 eching

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

a uchun yechish

$$a=\frac{4\left(b+20\right)}{5}$$

Chiziqli tenglamalarni yechish bo'yicha qadamlar

Tenglamaning ikkala tarafini 20 ga, 4,5 ning eng kichik karralisiga ko‘paytiring.

$$5a-4b=80$$

4b ni ikki tarafga qo’shing.

$$5a=80+4b$$

Tenglama standart shaklda.

$$5a=4b+80$$

Ikki tarafini 5 ga bo‘ling.

$$\frac{5a}{5}=\frac{4b+80}{5}$$

5 ga bo'lish 5 ga ko'paytirishni bekor qiladi.

$$a=\frac{4b+80}{5}$$

80+4b ni 5 ga bo'lish.

$$a=\frac{4b}{5}+16$$

b uchun yechish

$$b=\frac{5\left(a-16\right)}{4}$$

Chiziqli tenglamalarni yechish bo'yicha qadamlar

Tenglamaning ikkala tarafini 20 ga, 4,5 ning eng kichik karralisiga ko‘paytiring.

$$5a-4b=80$$

Ikkala tarafdan 5a ni ayirish.

$$-4b=80-5a$$

Ikki tarafini -4 ga bo‘ling.

$$\frac{-4b}{-4}=\frac{80-5a}{-4}$$

-4 ga bo'lish -4 ga ko'paytirishni bekor qiladi.

$$b=\frac{80-5a}{-4}$$

80-5a ni -4 ga bo'lish.

$$b=\frac{5a}{4}-20$$