Linear equation of one variable There are 48 barrels of water in the two tanks. Tank a adds twice as much water to tank B, and then tank B adds the remaining half of tank a to tank A. then the water in the two tanks is equal. How many barrels are there in the first two tanks?

A 32, B 16
Let a be x, B be y, and X + y = 48 be Formula 1
First, the first cloth, a becomes X-Y, B becomes 2Y
Second cloth, a becomes 3 / 2 * (X-Y), B becomes 2y-1 / 2 * (X-Y)
3/2*（x-y）=2y-1/2*（x-y）
The solution is x = 2Y
One win for simultaneous formula
x=32
y=16
Let y be 48-x

Engineering and linear equation with one variable
At the end of 4 hours in the morning, group a made 400 fewer parts than group B. at the end of 4 hours in the afternoon, the statistical results showed that group a made 4200 more parts than group B. how many parts did group A and group B make on this day?

Suppose a does x per hour and B does Y per hour
2x+400=4y ····（1）
6x=8y+4200····（2）
Convert one to 6x = 12y-1200 (3)
Then (3) is brought into (2) to get y = 1300
Take y = 1300 into (1) to get x = 2500
A made 2500 * 6 = 15000
B made 1350 * 8 = 10800

Four points a (1,0) B (5, - 2) C (8,4) d (4,6) of quadrilateral judge the shape of quadrilateral ABCD
Write down the specific process

A: point ABC is a parallelogram
Because edge CD and edge AB are parallel and equal

The solution of 8.7x-3.4x = 5.406 is faster and faster,

It is known that the circumference of a sector is C (c > 0). When the arc length of a sector is what, it has the largest area? And get the maximum area

Let R be the radius of the sector and l be the arc length, then C = 2R + L and R = C − L2, so the area of the sector s = 12rl = - 14l2 + 14cl. It can be seen that when l = C2, the area of the sector s has the maximum value of c216. When the arc length of the sector is C2, it has the maximum area and the maximum value of the area is c216. So the answer is: C2, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; c216

If the sum of even items is twice the sum of odd items, the first item is 1, and the sum of the two items in the middle is 24, then the number of items in the sequence is ()
A. 12B. 10C. 8D. 6

According to the meaning of the title, an = qn-1a2 + A4 + A6 + ··· + a2na1 + a3 + ··· + A2N − 1 = 2  q = 2, so an = 2N-1, we know that an + an + 1 = 24 ﹣ 2N-1 + 2n = 24 ﹣ n-1 = 3 ﹣ n = 4, 2n = 8, so the sequence has 8 terms

50% x-4 / 5 = 20% solution

50% x-4 / 5 = 20%
50% x = 20% + 4 / 5
0.5x=0.2+0.8
0.5x=1
x=2
Do not know, welcome to ask

Ask for a composition "Mom and dad really hard"
Better be real

There are too many examples of composition. Why do you look for it in knowing? The real composition comes from your own real life, and the contrast written by others will change your taste. Knowing is a platform for answering questions and solving doubts and communicating with others

How much is the square of (A's Cube)? (- a) cube + (- a) cube?

The square of (A's Cube) is equal to the fifth power of A
(- a) cube + (- a) = (- a) (a ^ 2 + 1)

X-15% x = 37.4

X-15%X=37.4
85%X=37.4
X=37.4/85%
X=37.4/0.85
X=74.8/1.7
X=44

Linear equation of one variable There are 48 barrels of water in the two tanks. Tank a adds twice as much water to tank B, and then tank B adds the remaining half of tank a to tank A. then the water in the two tanks is equal. How many barrels are there in the first two tanks?