Question

ТОЛЬКО УСЛОВИЕ!!! 3. Реши задачу. Запиши развернутый ответ. Во дворе находятся куры и поросята. Всего 6 голов и 18 ног. Сколько во дворе кур и сколько поросят?

Answer 1

Ответ:

Пошаговое объяснение:

поросят и кур - 6 голов

ног - 18

поросят-? шт

кур - ?  шт

если бы все были курами, то 6*2 (т.к. у кур 2 лапы) =12 лап

18-12=6 лап лишние.

т.к. у поросенка 4 лапы то 6:2( 2 лапы уже посчитали) =3 поросенка

6-3=3 курицы

проверим:

3*4=12 лап у поросят

3*2=6 лап у кур.

12+6=18 лап всего.

Answer 2

Problem Analysis

We are given that there are a total of 6 heads and 18 legs in a yard, which consist of chickens and piglets. We need to determine the number of chickens and piglets in the yard.

Solution

Let's assume that the number of chickens is represented by 'c' and the number of piglets is represented by 'p'.

1. Each chicken has 1 head and 2 legs. 2. Each piglet has 1 head and 4 legs.

Based on the given information, we can set up the following equations:

Equation 1: c + p = 6 (the total number of heads is 6) Equation 2: 2c + 4p = 18 (the total number of legs is 18)

To solve this system of equations, we can use substitution or elimination method.

Let's solve it using the elimination method:

Multiply Equation 1 by 2 to make the coefficients of 'c' in both equations the same:

Equation 1 (multiplied by 2): 2c + 2p = 12

Now, subtract Equation 2 from the modified Equation 1:

(2c + 2p) - (2c + 4p) = 12 - 18 2c + 2p - 2c - 4p = -6 -2p = -6

Divide both sides of the equation by -2:

-2p / -2 = -6 / -2 p = 3

Now, substitute the value of 'p' back into Equation 1 to find the value of 'c':

c + 3 = 6 c = 6 - 3 c = 3

Therefore, there are 3 chickens and 3 piglets in the yard.

Answer

In the yard, there are 3 chickens and 3 piglets.