1-4x / 3 = 1-x + 2 / 6

1-4x / 3 = 1-x + 2 / 6

1-4x / 3 = 1-x + 2 / 6 multiply by 6
2（1-4x）=6-x-2
2-8x=4-x
8x+x=2-4
9x=-2
x=-2/9

The original price of a computer is 6800 yuan, but now the price is reduced by 1700 yuan. How much is the price reduced?

1700 △ 6800 = 0.25 = 25%; a: 25% reduction

Solving equation 3 / 4x = X-1 / 4
No - 1 / 4

3/4X-X=-1/4
-1/4X=-1/4
X=1

The original price of one kind of air conditioner is 2000 yuan, but now it's 1600 yuan. What's the price reduction? Sugar cane comes from sugar factory
The original price of an air conditioner is 2000 yuan, but now it's 1600 yuan. What's the price reduction?
480 tons of sugarcane are transported from sugar factory, and the sugar yield of this kind of sugarcane is 12%. 42.5 tons of sugar have been squeezed from the transported sugarcane. How much more can be squeezed?
After flour is processed into noodles, the weight will increase by 30%. How many kilograms of flour need to be prepared to get 62.4 kilograms of noodles?

（2000-1600）/2000 *100%=20%
[480 - (42.5 / 12%)] 12% = 15.1 (ton)
62.4 / 130% = 48 (kg)

How to solve this equation? 1 / 2 + 3 / 5 × (105-x) = 58
There are 105 people in class A and class B. There are 58 people in one half of class A and three fifths of class B. how many people are there in each class? (solution of a series of equations)

1 / 2 + 3 / 5 × (105-x) = 58 times 10 on both sides of the equation
5+6×（105-x）=580
5+ 630-6x=580
635-6x = 580 plus 6x on both sides
635 = 6x + 580 minus 580
6x=635-580
6x=55
x=55/6

In May, 360 sets of air conditioners and refrigerators were sold in electrical appliance stores, and the number of air conditioners sold was 2.6 times that of refrigerators?

If x refrigerators are set, 2.6x air conditioners are set
x+2.6x=360
x=100
100 refrigerators and 260 air conditioners

Given the set a = {the square of X / x-3x + 2 = 0} B = {the square of X / x-ax + 3A = 0} if an (intersecting sign) B = B, find the value range of real number a

A = {1,2}, an (intersection sign) B = B, it is proved that B is a subset of A
So B may be an empty set, {1}, {2}, or {1,2}
When B = empty set, the discriminant = a ^ 2-12a0a does not exist
When B = {1,2} = = > A does not exist
So the value range of real number a is 0

In May, 360 sets of air conditioners and refrigerators were sold in electrical appliance stores. The number of air conditioners was 2.6 times that of refrigerators. How many air conditioners and refrigerators were sold?

If x refrigerators are sold, 2.6x air conditioners are sold
X + 2.6X = 360
3.6X = 360
X = 360 ÷ 3.6
X = 100
100 × 2.6 = 260 sets
260 - 100 = 160 sets
A: there is a difference of 160 air conditioners and refrigerators sold

What is the number of 4 (3x-5) ^ 3 = 9

4(3x-5)^3=9 (1)
(3x-5)^3=9/4
3x-5=(9/4)^(1/3)
3x=5+(9/4)^(1/3)
x=[5+(9/4)^(1/3)]/3 (2)
The approximate results are as follows
x ≈ 2.1034 (3)
Accurate value: x = 2.103456890034816101190276880077. (4)

How do air conditioners, refrigerators and other household appliances damage the atmosphere?
People say it's Freon,
However, the fact is that during the use of these appliances, freon does not leak out. How can it destroy the atmosphere?

Home appliances can't be broken
As soon as it breaks down, freon comes out
It affects the atmosphere~