Question

В зоопарке находятся фазаны и зайцы. У них вместе 12 голов и 34 ног. сколько фазанов и зайцев? (решить уравнением) заранее спасибо

Answer 1

Пусть x - кролики
Тогда (12-х) - фазаны
Известно, что всего у них 12 голов и 34 ноги
Уравнени:
4х+2(12-х)=34
4х+24-2х=34
2х+24=34
2х=34-24
2х=10
х=10:2
х=5 - кроликов
2) 12-х=12-5=7 (шт.) - фазанов.
Ответ: в вольере 5 кроликов и 7 фазанов

Answer 2

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Answer 3

Solving the Problem

To solve this problem, we can set up a system of equations based on the given information. Let's denote the number of pheasants as P and the number of hares as H. We know that the total number of heads is 12 and the total number of legs is 34. We can use these pieces of information to form the following equations:

1. P + H = 12 (total number of heads) 2. 2P + 4H = 34 (total number of legs, as pheasants have 2 legs and hares have 4)

We can solve this system of equations to find the values of P and H.

Solution

Let's solve the system of equations:

1. P + H = 12 2. 2P + 4H = 34

We can solve equation (1) for P: P = 12 - H

Substitute P from equation (1) into equation (2): 2(12 - H) + 4H = 34 24 - 2H + 4H = 34 24 + 2H = 34 2H = 34 - 24 2H = 10 H = 5

Now that we have the value of H, we can find the value of P using equation (1): P = 12 - 5 P = 7

Answer

So, there are 7 pheasants and 5 hares in the zoo.

This solution is based on the given information and the system of equations formed from it.