Who solves this math problem?????

This question is very deceptive, so I will explain it to you.

Wang: Suppose he and his neighbor exchanged 79 and 21 change (note that these are neighbors' money) neighbor: 100 fake money.

Young man: The boss gave him gifts of 79 yuan and 21 yuan, think about it, didn't Boss Wang have 21 yuan of neighbor's real money at this time, he gave this 21 yuan to his neighbor (he didn't owe his neighbor money when he paid 79 yuan) But it's easy to ignore here:

Boss Wang also lost a gift of 21 yuan at this time (pay great attention here, since the gift is lost, so the profit will not be earned, but also lose 3 yuan), and the 79 yuan paid to the neighbor, overall: so Boss Wang lost a total of 100 yuan, because the cause of the matter is this 100, so in the end it is impossible to more, and it is impossible to be less.

That's 100 yuan.

I've got 10 sides of this question.

Economy: 100

Math: 97 But we have to think financially, friend.

100 yuan to the neighborhood, get back 100 yuan from the neighborhood, and then return 100 to the neighborhood, offset, in fact, this condition is a distraction, there is no meaning.

There was no loss in the neighborhood.

The young man got 97

So the king lost 97

The cost is 18 yuan + 79 yuan for young people = 97 yuan.

The money given to others is:

Young people 18 + 79 = 97

Neighborhood: 100

So the total is 197 yuan.

I earned another 3 yuan.

So the loss was 194 yuan.

Lost: The cost of the gift + the money for the young man + the money exchanged with the neighbors = the money lost by Boss Wang 18 + 79 + 100 = 197 (yuan) Boss Wang lost 197 yuan in this transaction.

This is certainly not right. Obviously not equal to 56, the title is wrong.

Idea: The power of is equal to the reduction = 56

Or just that. This question is wrong.

Still is. That 2x = 56+.

2 x=x= Wouldn't it be just a list of numbers with no other answer?

Your question is wrong, why are there two equal signs?

Isn't it? Still is.

In the case of the latter, that 2x = 56+.

2 x=x=

You didn't write it right, these two equal signs can't exist at the same time, which equal sign is a minus. For example, yes.

That 2x is equal to.

2x is equal to x=

This problem needs to be used as an auxiliary line, which can further obtain the relationship between the edges and the angles.

Based on the fact that one of the angles of an isosceles triangle is 60 degrees, it can be said that it is an equilateral triangle, and the triangle is equal on three sides.

This question repeatedly uses the properties of isosceles triangles and equilateral triangles.

Analysis: Compare what is known with what is sought, find x≠0, divide the two sides by , get +1 x, and then square to reach the goal.

Look at the process and experience.

If you are satisfied, please adopt it in time. Thank you!

The purchase price is 400 yuan.

The profit margin is 5% when selling at a discount

420 600 = fold.

Solution: Set the product to be folded by X**.

Then: 400 (1+5%) = 600x

600x=420

x=70%A: This product is 7% off**.

3-2 * (3) 2-(1-3) + 1 = 3

|- Follow the number 3|-2sin60 degrees = 0

tan45 degrees = 1

Degree plus"I don't know what it means.

|- Follow the number 3|-2sin60 degrees - (1-3) degrees plus tan45 degrees.

Root number 3-1-1 + root number 3+1

2 Root No. 3-1

|a+1|+(b-5)^2+(25c^2+10c+1)=0|a+1|+(b-5) 2+(5c+1) 2=0 absolute and square are greater than or equal to 0

If you add to 0, only all are equal to 0

So a+1=0, b-5=0, 5c+1=0

So a=-1, b=5, c=-1 5

So abc=1

Original formula = 1 251 [1 11*b(bc) 7]=1 [5 (-1) 7].

Solution: Derived from the non-negative meaning:

a+1=0b-5=0

25c 2+10c+1=(5c+1) 2 =0 i.e.: a=-1

b=5c=-1/5

Substitution, got. abc) 251 A 11 b 2 C 7 original = (-1*5*-1 5) 251 [(1)*25*1 25*(-1 5) 5].

Since the equation is equal to 0, the absolute value must be equal to 0 in the square, so the solution gives a=-1 b=5 c=-1 5, so the equation to be asked is =1 5

Note 5 8 * [1 5] 7 can be sorted into -1 5

Yes |a+1|+(b-5) 2+(25c 2+10c+1)=0 a=-1 b=5 c=-1 5 If the sum of non-negative numbers is 0, then all items are 0

Then (abc) 251 (a 11b 8c 7) becomes 1 251 5 8*1 5 7=1 5

It is known that the reals a, b, and c satisfy |a+1|+(b-5)^2+(25c^2+10c+1)=0

Find the solution of the value of (abc) 251 (a 11b 8c 7): |a+1|+(b-5)^2+(25c^2+10c+1)=0|a+1|=0 ， a=-1

b-5)^2=0 b=5

25c^2+10c+1)=0

5c+1)^2=0

c=-1/5

i.e.: (abc) 251 (a 11b 8c 7)=[-1*5*(-1 5)] 125 [(-1) 11*5 8*(-1 5) 7].

There is more than one way, it is recommended to use definite integrals to calculate directly, and the result of this problem involves inverse trigonometric functions, so the "sixth grade" mentioned in the question is purely eye-catching.

Result: S shadow = 4-18 5 * (arcsin2 5 5), it really doesn't count with elementary school knowledge.

Let the volume of the ball be x, the equation is 4x 5, and the solution is x 785 (cm).

Monday is positive.

The water level is low meters.

Tuesday was below normal water levels, meters, and meters lower than Monday.

Wednesday was below the normal water level by meters, meters, and ** meters on Tuesday.

Thursday was higher than the normal water level meters, meters, and higher than Wednesday.

Friday was higher than the normal water level, meters, and more meters than Thursday.

On Saturday, the water level was higher than normal, and it was slightly higher than on Friday.

On Sunday, the water level was higher than normal, and it was lower than on Saturday.

The general situation is: weeks.

One, two down, week.

Three, four, five, six**, with a slight pullback on Sunday.

This kind of data stuff is clearest in the charts!

First down and then up.

Except for Monday and Tuesday, which fell more, Sunday dropped slightly, and the rest of the time it rose, with Wednesday rising the most.

I would like to ask what level of question is this? Is it a university? Or is it an elementary school? Or middle and high school?