How to solve the equation x + 9 / 4x = 5.2? The incubation period of duck is 1 / 3 longer than that of chicken, and duck incubator is ()

How to solve the equation x + 9 / 4x = 5.2? The incubation period of duck is 1 / 3 longer than that of chicken, and duck incubator is ()

X + 9 / 4x = 5.2
13X = 5.2
X = 5.2 △ 13 / 9
x=3.6
The incubation period of duck is 1 / 3 longer than that of chicken, and the incubator of duck is 4 / 3 longer than that of chicken
1 + 1 / 3 = 4 / 3

Y = 1 is the solution of the equation 2 − 13 (m − y) = 2Y. (1) find the value of M; (2) under the condition of (1), find the solution of the equation m (x + 4) = 2 (MX + 3) about X

(1) Substituting y = 1 into equation 2 − 13 (m − y) = 2Y, 2 − 13 (m − 1) = 2, removing denominator, 6 - (m-1) = 6, removing bracket, 6-m + 1 = 6, shifting term, obtaining - M = - 1, coefficient is 1, obtaining M = 1. (2) substituting M = 1 into m (x + 4) = 2 (MX + 3), obtaining x + 4 = 2 (x + 3), removing bracket, obtaining x + 4 = 2x + 6, shifting term and merging similar term, obtaining - x = 2, coefficient is 1, obtaining x = - 2

(x + 8) divided by 1.2 = 20

(x+8)÷1 .2=20
x+8=20x1.2
x+8=24
x=24-8
x=16

60% of a number is 27 more than 3% of 8. What's the number? (solve by equation)

Let this number be X
60%x-3/8x=27
9/40x=27
x=120

How to convert the price of fabric per kilogram to that of fabric per meter? How many square meters are there per kilogram?

First of all, we should know the gram weight, width, weight unit price or unit price per meter of fabric, then use gram weight x width = gram weight / meter, and then use weight unit price x gram weight / meter = unit price per meter
For example: weight of 200g / m2, width of 150cm, unit price of RMB 100 / kg, calculated as follows:
0.2KGX1.5M=0.3KG/M
RMB100X0.3KG=RMB30/M
Conversion of unit price of rice to unit price of weight

How to divide an equilateral triangle into three congruent trapezoids? It's better to have a schematic diagram

Triangle ABC (vertex a)
Divide the three sides equally
The bisection points are D E (edge AB, and so on), F G, H I,
Connecting eh DG fi
Three lines intersect at one o
Trapezoidal AEOI is equal to beog and cgoi
And divide the equilateral triangle ABC into three equal parts!

A line, a ray, a line segment, and a point each have several axes of symmetry

There are two symmetrical axes of a line segment: one is its vertical bisector, and the other is its own straight line;
There is only one axis of symmetry of a ray: the line on which it lies;
There are innumerable axes of symmetry of a line: itself and all the lines perpendicular to it (in the same plane);
There are innumerable axes of symmetry of a point: any line passing through it

Known: x ^ 2 + y ^ 2-2x + 2Y = - 2, find the value of x ^ 2007 = y ^ 2006
^It's Square, how many times

x^2+y^2-2x+2y=-2
(x^2-2x+1)+(y^2+2y+1)=0
(x-1)^2+(y+1)^2=0
(x-1)^2=0,(y+1)^2=0
x-1=0,y+1=0
x=1,y=-1
What is the value of x ^ 2007 = y ^ 2006
Substituting x = 1, y = - 1, LZ should be able to calculate by itself

Given that a and B are two non-zero vectors, let the angle between a and B be c. if there is C, let Ia + bi = root 2, IA Bi hold, then C is obtained
It is known that a and B are two non-zero vectors. Let the angle between a and B be c. if there is C, let Ia + bi = root 2, IA Bi hold, and the value of C is obtained

(a + b) square = a party + B Party + 2A * b = 2 (a-b) square = a party + B Party - 2A * B, that is (a + b) square = a party + B + A + B Party + B + 2A * b = a + B + B + 2A * b = a + B + B + 2A + B + 2A + 2A + B = 2A + B + 2B + 2b-4 a * B from the simplification, we can get (a + b) square = a party + a party + b-2a + b-2a * B, that is (a + A + B) square = a + B [a + B [[a + b] square = a + B [a + b] square = a + B [[a + b] is the square = (a-a-b [A-B] is the [a-a-b] is the [A-B [A-B] square] in this is the [[[[a] is the [a] is A-B] this is the [[a] is the [a) - 2 | a | * | B | cos

In △ ABC, e and G are two points on the edge of AB, AE = BG, F and H are two points on the edge of AC, AF = HC, EF parallel to GH parallel to BC. If EF = 5cm, GH = 9cm

Take a point P on CE to make EP = CP;
Take a little Q on HF so that QH = QF;
Link PQ
∴PQ=½（EF+BC）
=7cm
∵AE=BG
EQ=CQ
∴AQ=BQ
Similarly, AP = CP
∴PQ=½BC
∴BC=14cm