Solve the problem, come and help with the math problem

Solution: If the cost of this product is a yuan, then the pricing is a + 20 =.

Solution: a=1500

A: The cost of this item is 1500 RMB.

The cost is set to be $x, so the price is 1+

And because 8 8 fold **, the column formula is:

1．2x＊0．88－x＝84

Solution x=1500

840 yuan. Set the cost x

Pricing = x margin, cost accounts for 80%)

The profit after discount is 84 yuan - 84 = x

So: x=84 (

Why add 20% to the pricing: because to get a profit, 20% is the profit margin.

If the purchase price is regarded as the unit "1", the pricing is 1+20%, and the selling price is: (1+20%)*88%=

The profit of 84 yuan 84 corresponding to the score is.

So the cost, that is, the purchase price of the commodity, is 84 (yuan.

Column: (1+20%)*88%=

84 (RMB.)

Solution: Let the cost of this product be X yuan.

x+20％x）×88％－x＝84

x=1500

A: The cost of this item is 1500 RMB.

The answer is 1500 is correct, and the price is (x+, because there is a 20% profit.

4:5 A is four fifths times that of B.605

every hour. 26m from 2,400 tons.

The number of A divided by the number of B = the ratio of A and B is (4): 5) A is a multiple of the number of B??

In "Every Football.

60 yuan, bought 5 "The amount included in the unit price is ( unit price.

and ( quantity.

The implied amount is ( Total price

1. Minutes of an hour).

2. (6 200) x 80000 = 2400 (tons) 3

Already, x is a natural number, and x in turn represents an angle, 1) when x is the first.

1. The second image is time-limited, |sinx|Positive: f(x)=1 2(1+3)=22) when x is the first.

Three, four images are time-limited, |sinx|Negative: f(x)=1 2(-1+3)=1 The following is a discussion of x, which is a further difficulty.

There is no 0 non-state influence in the natural number, assuming that there is).

1) Medium: 0+2k(pi)=k=0, there is a value: 0,1,2,3;

When k=1, there is a value: . . Min closed answer.

Uh, then in (2): pi+2k(pi)=k=0, there are values: 4,5,6;

When k=1, there is a value: . .

You can find patterns and write sequences.

There's no requirement in the question.,I'm not going to get it.,Typing is too annoying.。

sinx !=0 x!=0

The number of sinx > is resistant to f(x)=2 when it is 0 (2k sinx< f(x)=1 at 0 (2k + x<2k +2 x belongs to the natural number, k belongs to the natural number of potato Hongchun).

Draw a coordinate axis diagram to find out. The coordinates of the negative half axis of the y-axis of this circle are (0,-8), and the coordinates of the positive half axis of the y-axis are (0,2),

Children, you can draw a coordinate map first, and then use the compass to draw a garden.

Answer, 2

-2 d-2 e 2 1 root number under d square + e square = 4f

The value of the determinant on the left of d is 0, and the specific method: imitation shed.

Row Selling Dust = 2 * (0 * 6 - 1 * 5) Preparation - (-1) * (3 * 6 - 4 * 5) + 4 * (3 * 1 - 4 * 0).

The determinant on the right is x 2-4*5=0

So, x = plus or minus root number 20

x is approximately equal to plus or minus.