Solution equation: x + 3 = 3x-5

Solution equation: x + 3 = 3x-5

x+3-3x+5=0
-2x+8=0
2x=8
x=4

A kind of TV set, the original price is 18800. Now the price is reduced by 800. What percentage of the original price is the current price?

（18800－800）/18800=95.744%
The current price is about 95.744% of the original price

(x + 2x-2) + (2x-2 × 2-2) = 20 (solving equation)

3X-2+2X-2=20
5X-4=20
5X=20
X=4.8

The original price of a color TV set is 4000 yuan, but now it's reduced to 3200 yuan. How much lower is it than before?

20%

Solve the equation x (x + 2) + (2x + 1) (2x-1) = 5 (x + 3)

x(x+2)+(2x+1)(2x-1)=5(x+3） x^2+2x+4x^2-1=5x^2+15 2x=15+1 2x=16 x=8

For a piece of clothing, first reduce the price by 10%, and then increase the price by 10%. The price is 198 yuan. How much is the original price of this clothing?

Suppose the original price of this dress is x yuan. After the price is reduced, it is x-x10%. After the price is increased, it is (x-x10%) 10% + (x-x10%). Then (x-x10%) 10% + (x-x10%). = 198. Just solve X

The solution equation: X (x + 2) 1 + (x + 2) (x + 4) 1-2x 1 = 2

Answer: X (x + 2) of 1 + (x + 2) (x + 4) of 1-2x of 1 = 21 / [x (x + 2)] + 1 / [(x + 2) (x + 4)] - 1 / (2x) = 2, the first two split terms are: 1 / (2x) - 1 / [2 (x + 2)] + 1 / [2 (x + 2)] - 1 / [2 (x + 4)] - 1 / (2x) = 2, so: - 1 / [2 (x + 4)] = 2, so: x + 4 = - 1 / 4, the solution is: x = - 17 / 4

After a 10% price increase, a 10% price decrease. The current price is 198 yuan. How much is the original price?

A: the original price is 200 yuan

Eight thirds x-one and three fifths equal zero (solving the equation)
In a hurry in a hurry

Eight thirds x-one and three fifths = 0
Eight thirds x = one and three fifths
Eight thirds x = eight fifths
5x=3
X = 3 / 5

If the original price of a garment is 200 yuan per piece, first increase the price by a%, and then decrease the price by a%, and the price is 198 yuan, then a is?

200(1+A%)(1-A%)=198
1-(A%)^2=198/200
1/100=(A%)^2
A% = 10% or - 10% (rounding off)
So a = 10