X+X+X+Y+Y=54 X=( ) Y+Y+Y+X+X=56 X=( )

X+X+X+Y+Y=54 X=( ) Y+Y+Y+X+X=56 X=( )

3X+2Y=54.(1)
2X+3Y=56.(2)
(1) * 3 - (2) * 2 eliminate y, have
9x-4x=162-112
5x=50
x=10
Hope to help you

(- 7) x (- 56) x0 ÷ (- 13) calculation

0

What is (- 7.56) + 13.76 + 7.56 + 13.24?
Write the process down

（-7.56）+13.76+7.56+13.24
=(13.76+13.24)+(-7.56+7.56)
=27+0
=27
If you don't understand,

How to solve the equation (42 + x) * 5 = 56

(42+x)×5=56
45×5+5x=56
5x=56-225
5x=-169
x=-169/5

Now the same number of chickens and rabbits are in the same cage. There are 42 more rabbit legs than chicken legs. How many chickens and rabbits are there in the cage?
Solution of a series of equations

Suppose there are x rabbits in each group. Rabbit feet chicken feet = 4x-2x = 42. X = 21
Each has 21

There are the same number of chickens and rabbits in a cage. There are 42 more legs than chicken legs. How many chickens and rabbits are there?

Method 1 (arithmetic): because each rabbit has two legs more than each chicken, and the number of chickens and rabbits is the same, the total number of more is 42, so the number of chickens and rabbits can be calculated as 42 / 2 = 21
A: there are 21 chickens and 21 rabbits each
Method 2: suppose there are x chickens, then there are x rabbits. The equation is 4x-2x = 42, so 2x = 42, so x = 21
A: there are 21 chickens and 21 rabbits

At present, the same number of chickens and rabbits live together in a cage. It is known that there are 22 more rabbit legs than chicken legs. Q: how many chickens and rabbits are there respectively?
But I want the formula

Suppose there are x chickens and X rabbits each
4x-2x = 22
The solution is x = 11
A: there are 11 chickens and 11 rabbits each

The total number of chickens and rabbits is 107. There are 56 more rabbit legs than chicken legs
The total number of chickens and rabbits is 107. There are 56 more rabbit legs than chicken legs?

Set X chickens and Y rabbits
From the meaning of the title [x + y = 107]
〔 2X+56=4Y 〕
The solution is (x = 62)
（ Y=45 ）
A: there are 62 chickens and 45 rabbits

It is known that there are 45 rabbits and chickens in total. There are as many legs as rabbits. How many rabbits and chickens are there

If there are x rabbits, there are (45-x) chickens
4x=2(45-x)
4x=90-2x
4x+2x=90
6x=90
x=15
45-15=30
A: there are 30 chickens and 15 rabbits

It is known that there are 45 rabbits and 45 chickens, and there are as many legs as rabbits. How many rabbits and chickens are there?

Set X rabbits
4x=2(45-x)
4x=90-2x
4x+2x=90
6x=90
x=15
Chicken 45-15 = 30
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