Solve the equation: 2 / 3x-2 = 4 / 19

Solve the equation: 2 / 3x-2 = 4 / 19

Both sides * 4
6x-8=19
6x=27
x=4.5
nine-seconds
9/2
Solution equation: 1.3x + 4.3x = 19.8
56x=198
x=99/28
1.3x+4.3x=19.8
Merger:
5.6x=19.8
x=99/28
1.3x+4.3x=5.6x
5.6x=19.8
x=19.8÷5.6=3.54
The answer is over
1.3X+4.3X=19.8
5.6X=19.8
X = 19.8 divided by 5.6
OK, ha ha
1.3x+4.3x=5.6x
5.6x=19.8
x=19.8÷5.6=3.54
1.3X+4.3X=19.8
(1.3+4.3)X=19.8
5.6X=19.8
X=19.8/5.6
X = 99 / 28 ~ ~ (approximately equal to) 3.54
Children, please pay attention to the format when solving the problem
Solving equation 3 / 4x1 / 4x = 11 / 12
There's another one!
A workshop produced 500000 parts last year. This year's production is higher than last year's, and this year's production is higher than last year's
Million parts, this year's production of parts () million
Equation 3 / 4x-1 / 4x = 11 / 12
X is not a multiplier
3/4x-1/4x=11/12
2/4x=11/12
2x=12/11
x=12/(11*2)
x=6/11
Knowledge about momentum: the expression of the velocity of two bodies after collision with equal mass and related discussion?
1/2MV1^2+1/2MV2^2=MV3^2 ==>2V3^2=V1^2+V2^2
3 / 4x = 9 / 20 21 / 44x = 7 / 11
Mathematics talent team for you
3/4x=9/20
x=9/20×4/3
x=15
21/44x=7/11
x=7/11×44/21
x=4/3
3/4x=9/20
x=9/20*4/3
=3/5
21/44x=7/11
x=7/11*44/21
=4 / 3 question: is 3 / 4x = 9 / 20 x = 9 / 20 * 4 / 3 9 / 20x3 / 4?
I know that the formula of collision between two objects is derived from the conservation of momentum and energy, but who can tell me about the derivation process? The difference between my own formula and the one given by him is very big
v1 = [(m1-m2)v10 + 2m2v20] / (m1+m2) 　　
v2 = [(m2-m1)v20 + 2m1v10] / (m1+m2)
I'll give you an idea
1 --- list momentum and energy equations
2 --- move the two equations related to M1 to the left and M2 to the right
3-divide the two equations, energy divide momentum, and get a quadratic equation of two variables
4 --- solve the new equation and momentum equation simultaneously, and everything is OK
Solve the equation 4x-3.4 = 25
4x=25+3.4
4x=28.4
x=7.1
4X=25+3.4
4X=28.4
X＝7.1
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Derivation of velocity formula for elastic frontal impact
I don't know how to draw a graph. Let's talk about the method (I use μ to express the final velocity). Eliminate all "1 / 2" of equation 2, and then transfer the terms of equation 1 and 2 to get the following two equations: M &; V &; - M &; μ &; = M &; μ &; - M &; V &; M &; V &; -; - M &
3 / 4x-0.25 = 2 solution equation
3/4x=2+0.25
3/4x=2.25
X=3
X=5
3/4x+20.25
3/4x=2.25
x=2.25÷3/4
X=3
3/4x-1/4=2
3/4x=2+1/4=9/4
4x=3*4/9
x=3*4/（9*4）
x=1/3
3/4x=2+0.25;
3/4x=2.25
3/4x=9/4
X=3
Who can tell me about the primary school mathematics, conversion area unit rule ah?
1 sq km = 10 ha = 1000000 sq m
1 ha = 10000 M2
1 square meter = 100 square decimeter
1 square decimeter = 100 square centimeter
1 sq cm = 100 sq mm
In primary schools, the area unit of hectare is involved. The most special rate of square meter and hectare is 10000. The rate of other two adjacent area units is 100