Hurry, hurry... If you know how to do math, you have to hurry up

This should be solved using a system of equations!

Solution: Suppose there are x pigeons in the tree and there are y pigeons under the tree.

According to the title: y-1=(x+y) 3

x-1=y+1 ②

From 3=2y-x

Put to get: x=y+2

Substituting into yield: 2y-y-2=3

y=5 substitute y=5 into the yield: x=7

A: There are 7 pigeons in the tree and 5 pigeons under the tree.

Absolutely correct, our teacher has assigned similar questions, but it's not a pigeon or a rabbit... Hey hey

There are x pigeons in the whole flock.

Then there are 1 2x+1 pigeons in the tree and 1 3x+1 under the tree.

1/3x+2=1/2x

Solution. x=12

There are 7 on the tree and 5 under the tree.

Suppose there are x pigeons on the tree and y under the tree.

Get: x+1=3(y-1) (1).

x-1=y+1 （2）

From (2) we get x=y+2 (3).

Substitute (3) into:

y+2+1=3y-3

6=3y-y

y=3 3 under the tree, 5 on the tree.

Set: A on the tree and B under the tree.

b-1=（a+b）1/3

a-1=b+1

Solve systems of equations.

a=7b=5

Mitsubishi column volume = base area times height.

Mitsubishi cone volume = 1 3 base area times height.

So: the volume of the triangular prism is 4 times the root number 3

Base area = (root number 3) * 2 2 4 = root number 3

Volume = (1 3) Base Area * Height = (1 3) (Root No. 3) * 4 = (4 3) Root No. 3

4 3, that is, a=b=c, I will call you out at night.

I don't know if the first number of the first question is one of minus three and two cautious and wide, wide and noisy, or just minus three... The former hits Hu and chooses B, and the latter chooses A

d (the number is 2+3).

b （k+1=3 k=2）

In the middle of the night, my language was a little confused, do you know if you understand...

The average annual growth rate of sales of energy-efficient lamps is x

5*(1+x)^2=

1+x)^2=

1+x=x=20%

The average annual sales growth rate of high-efficiency energy-saving lamps is 20%.