To solve the equation, 7 / 12 - 1 / 4 = 5 / 6 A wooden stick cuts 1 / 3 of the total length, just cuts 1 / 3 of the meter. The original length of this wooden stick is () meters, how many meters are left A cuboid glass fish tank with a height of 50 is a square with a perimeter of 60. Now pour 9 liters of water into the tank. How high is the water in the tank?

To solve the equation, 7 / 12 - 1 / 4 = 5 / 6 A wooden stick cuts 1 / 3 of the total length, just cuts 1 / 3 of the meter. The original length of this wooden stick is () meters, how many meters are left A cuboid glass fish tank with a height of 50 is a square with a perimeter of 60. Now pour 9 liters of water into the tank. How high is the water in the tank?

7/12-x/4=5x/6
(5/6+1/4)x=7/12
(13/12)x=7/12
x=7/13
Original length of stick: (1 / 3) / (1 / 3) = 1m
Remaining: 1-1 / 3 = 2 / 3M
Bottom side length: 60 / 4 = 15 cm
9 liters = 9 cubic decimeters = 9000 cubic centimeters
Water height: 9000 / (15 * 15) = 40 cm

We have to do it with the equation (once per dollar),
1. In order to build the brand of "Zhejiang Green Valley", Lishui City decided to hold agricultural and sideline products exhibition in the provincial capital. A foreign trade company launched brand products of "Shanshan brand" mushroom and "Qier" Huiming tea, with a total of 10 tons to attend the exhibition. Six vehicles were used for shipment, and each vehicle was required to be fully loaded, and only one product could be transported; due to packaging restrictions, each vehicle could hold 1.5 tons of mushroom or 2 tons of tea when fully loaded, How many cars do you need to transport mushrooms and tea
2. One side of a rectangular chicken farm is close to the wall, which is 14 meters long, and the other three sides are surrounded by fences. Xiao Wang plans to use the 35 meter long fence to build a chicken farm, which is 5 meters longer than the width. Xiao Zhao also plans to build a chicken farm, which is 2 meters longer than the width. Whose design do you think conforms to the reality? According to his design, what is the area of the chicken farm? (use the equation)

1.5x + 2 (6-x) = 101.5x + 12-2x = 100.5x = 2 x = 4 6-4 = 2 A: 4 cars for Lentinus edodes and 2 cars for tea. 2. Set the width as X meters. Xiao Wang: 2x + (x + 5) = 353x = 3

Primary school mathematics problems (require equations, write the number of process and, it is best to explain the reason)
1. The number of computers sold in the computer market one day is 3.3 times that of the copier, and the number of computers sold is 44 more than that of the copier?
2. There are 100 apples in four plates. Add 4 to the number of the first plate, subtract 4 from the number of the second plate, multiply 4 by the number of the third plate, and divide 4 by the number of the fourth plate. How many apples are there in the original four plates?

1. The number of computers sold in the computer market one day is 3.3 times that of the copier, and the number of computers sold is 44 more than that of the copier?
Let X be the copier,
The computer is 3.3x
From the meaning of the title, x + 44 = 3.3x
44＝2.3x
Copier: get 19 (keep integer)
Computer: 19 + 44 = 63
2. There are 100 apples in four plates. Add 4 to the number of the first plate, subtract 4 from the number of the second plate, multiply 4 by the number of the third plate, and divide 4 by the number of the fourth plate. How many apples are there in the original four plates?
Let X be the first disk, then
Second set original x + 4 + 4
Third set original (x + 4) / 4
Fourth set original (x + 4) * 4
So there are:
x+(x+4+4)+(x+4)/4+(x+4)*4=100
That is, (25 / 4) x = 75
The solution is x = 12
So there were 12 in the first set, 20 in the second set, 4 in the third set and 64 in the fourth set

Given that the solutions X and y of the equations 4x + 3Y = 1 and ax + (A-1) y = 3 are equal, find the value of A

11、 From the first one, we can see that x is 1 / 7, y is also 1 / 7, and we can substitute it into two formulas

97×2000-96×2001．

97×2000-96×2001，=97×2000-96×（2000+1），=97×2000-96×2000-96，=（97-96）×2000-96，=2000-96，=2000-100+4，=1900+4，=1904．

Let n be an integer, and the number of 3 divided by 6 is expressed as ()
Why 6N + 3?

Let n be an integer, and the number of 3 divided by 6 is expressed as (6N + 3)
(n is a non negative integer)
Come on! If you don't understand, ask again and answer sincerely!

25 ° 33 ′ divided by 4 + 24 ° 56 ′ 13 ″
How to calculate 25 ° 33 ′ / 4

25 ° 33 ′ divided by 4 + 24 ° 56 ′ 13 ″
=24°92′60″÷4+24°56′13″
=6°23′15″+24°56′13″
=30°79′28″
=31°19′28″

If the bottom of a triangle is increased by 3cm, the area will be increased by 12cm. What do you know from this information?

According to this information, the height of the triangle can be calculated as 2 × 12 △ 3 = 8 cm

Solving the equation x ^ - 2x-18 = 0 to find - 2x ^ + 4x-18
fast
fast

x^-2x-18=0
be
2x²-4x=36
-2x²+4x=-26
therefore
-2x^+4x-18=-36-18=-54

There is a semicircular part, perimeter is 20.56, find the area of this semicircular part

Let the radius of this semicircle be r
(3.14*2*R)/2+2*R=20.56
3.14R+2R=20.56
5.14R=20.56
R=4
The area of this semicircular part
=3.14*4*4
=50.24