The 1. equation refers to an equation containing unknowns. It is an equation that represents the equal relationship between two mathematical expressions (such as two numbers, functions, quantities and operations), and the value of the unknown quantity that makes the equation hold is called "solution" or "root". The process of finding the solution of the equation is called "solving the equation".
2. By solving the equation, the difficulty of reverse thinking can be avoided, and the equation with the quantity to be solved can be listed directly. There are many forms of equations, such as one-dimensional linear equation, two-dimensional linear equation, one-dimensional quadratic equation and so on. , can also be combined into equations to solve multiple unknowns.
3. In mathematics, an equation is a statement of an equation containing one or more variables. Solving an equation involves determining which variables have values that make the equation valid. Variables are also called unknowns, and the value of the unknowns satisfying the equation is called the solution of the equation.
4. As early as 3600 years ago, the mathematical problems written by ancient Egyptians on papyrus involved equations with unknowns. Around 825 AD, Al-Hualazimi, a mathematician in Central Asia, wrote a book called "Eliminating Elements and Returning to Them", focusing on solving equations.
5. The word Chinese in the equation comes from the ancient mathematics monograph "Nine Chapters of Arithmetic", the eighth volume of which is called "Equation". "Fang" means juxtaposition, and "Cheng" is a vertical form with calculation.
6. Volume 8 (1) says: Today, the upper river catches three, the middle river catches two, and the summer river catches one, which is actually thirty-nine; Two catches on the grain, three catches on the grain, and one catch on the grain, with 34 fights; Catch the first grain, catch the second grain, catch the third grain, and actually fight 26 battles. What are the geometric shapes of the upper, middle and lower crops? (At present, there are 3 bundles of first-grade millet, 2 bundles of middle-grade millet, low-grade millet 1 bundle and 39 bundles of millet * * * *; 2 bundles of first-class millet, 3 bundles of middle-class millet, lower-class millet 1 bundle, producing 34 buckets of millet; There are 1 packages of excellent millet, 2 packages of medium millet, 3 packages of poor millet, and 26 barrels of millet. How many barrels of millet can be produced by first-class millet 1 bundle, medium millet 1 bundle and low millet 1 bundle? )
7. Answer: Last catch, nine fights a quarter, neutralization a catch, four fights a quarter, next catch, two fights three quarters.
8. Equation technique says: Put the grain above into three hands, the grain in the middle into two hands, and the grain below into one hand, which is actually thirty-nine buckets, on the right. Middle, left, right. Multiply the grain in the right row by the middle row and divide it directly. Multiply by seconds and then divide by a straight line. However, in the case of the Bank of China, those crops that can't be planted are divided into left and right. If there are endless crops on the left, there are laws above and reality below. Reality is the next reality. Neutralization, multiplication, and division of the next grain. I am as good as Zhonghe. This is the reality of Zhonghe. The upper grain is also based on the right line multiplied by the right line, but the lower grain and the middle grain are excluded. I am one of the top stubble, which is the reality of the top stubble. Everything is like the law, and each has its own struggle.