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The process of solving the application problem of one variable linear equation in Grade Seven 1. It takes two hours for Party A to drive from place a to place B, and three hours for Party B to ride a motorcycle. If Party B starts from place B to place a by motorcycle, and one hour later Party A drives from place a to place B, how long does it take for Party A to meet Party B? 2. It takes 20 hours for one person to do a batch of data collation. Now, several people do it for 2 hours, and then two more people do it together for 4 hours. How many people participated in data collation at the beginning? Use the equation of one variable to solve!
1. Let x hours meet
（1/2+1/3）x=1-(1/3)
(5/6)X=(2/3)
X=0.8
2. Suppose there are x people at the beginning
（1/20）*2X+(1/20)*4*(X+2)=1
(1/10)X+(1/5)X+(2/5)=1
(3/10)X=(3/5)
X=2
The concept of linear equation of one variable: both sides of the equation are integers and contain only one unknown, and the exponent of the unknown is linear
In the above sentence, "there is only one unknown number" is there one unknown number on both sides of the equation, or is there only one unknown number in the whole equation?
Which of the following two equations is the one variable linear equation ()
A.2x=3y
B.7x+5=6（x+1）
A. 2X = 3Y is not because there are two unknowns
B. 7x + 5 = 6 (x + 1) is, because there is only one unknown number. Although x appears twice, it will only appear once after merging similar items
Who can help me say some famous sayings of mathematicians?
Not too many. More than ten,
Mathematics is an infinite science
——Hermann wail
Some beautiful theorems in mathematics have such characteristics: they are easy to be induced from facts, but the proof is very deep. Mathematics is the king of science
——Gauss
In the field of mathematics, the art of asking questions is more important than the art of solving them
——Cantor
As long as a branch of science can raise a large number of questions, it is full of vitality, and the lack of questions indicates the termination or decline of independent development
——Hilbert
In the world of mathematics, what matters is not what we know, but how we know
——Pythagoras
A science, only when it successfully uses mathematics, can it reach the true perfection
——Marx
The scientific level of a country can be measured by the mathematics it consumes
——Rao
Mathematics, the unshakable cornerstone of science, is the rich source of human progress
----Barrow
The ruling God on Mount Olympus is the eternal number
----Jacobi
If there is no eternal imitation of the universe made by numbers, then human beings will not be able to survive
-----Nietzsche
Those who don't know geometry are not allowed in
-----Plato
The way of geometry without king!
-----Euclid
Mathematicians are actually addicts. If they don't, there will be no mathematics
-----Novalis
No great discovery can be made without bold speculation
----Newton
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