4X + 20% x = 16.8 (solving equation)

4X + 20% x = 16.8 (solving equation)

Solution, (4 + 0.2) x = 16.8
4.2x=16.8
X = 16.8 / 4.2
x=4

The price of a refrigerator was reduced by 10% and then by 20%. Now the price is 720. What's the original price of this refrigerator

Set this refrigerator to X Yuan
X*（1-10%）*（1-20%）=720
X=1000
A: this refrigerator costs 1000 yuan

Solve the equation, x + 4x-16 = 3

19 / 5, 19 / 5

How much is the current price of a refrigerator
What's the original price now?

Let the original price be X
The current price = x * 90% * 90% = 81% X
So the current price is 81% of the original price

The solution equation: 4x = 20
Urgent,

X=5

In a shopping mall, the price of A-type refrigerator is 2190 yuan. In order to reduce inventory, the shopping mall decided to reduce the price of A-type refrigerator. It is known that the purchase price of A-type refrigerator is 1700 yuan. In order to ensure that the profit margin is not less than 3%, how much is the maximum price reduction of A-type refrigerator? One yuan inequality solution

Suppose the refrigerator price is reduced by X, then the following inequality is listed: 2190-x ≥ 1700 × (1 + 3%)
X≤2190﹣1700×（1﹢3%）
X ≤ 439 (yuan)
So the maximum price reduction is 439 yuan

3 / 4x - + 5 = 16 solution equation

3/4x-5＝16
3/4x=16+5
x=21x4/3
x=28

The price of a refrigerator is 2400 yuan. Now it's sold at a 70% discount, and the profit is 12%. How much is the purchase price?

2400*0.7＝1680
1680*（1-0.12）＝1478.4
The purchase price is around 1478

3.1 * 6-4x = 1 to solve the equation

3.1*6-4x=1
18.6-4x=1
4x=18.6-1
4x=17.6
x=17.6÷4
x=4.4

The purchase price of a certain refrigerator is x yuan, which is increased by 20% according to the purchase price. Later, due to the product update, the price of the refrigerator is reduced by 90%. Now, there are many refrigerators______ A profit of $1

First, calculate the actual price = (1 + 20%) × 90% x = 1.08x, then the profit = 1.08x-x = 0.08x yuan