The process of solving the equation and writing the checking calculation is to substitute the unknown value into the original equation, and whether the number on the left is equal to the right, so as to judge whether the unknown value is the solution of the equation. If equal, it is the solution of the original equation; If it is not equal, it is wrong.
An equation refers to an equation containing unknowns. It is an equation that represents the equal relationship between two mathematical expressions such as numbers, functions, quantities and operations. The value of the unknown quantity that makes the equation hold is called the solution or root.
An 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 a solution or root. The process of finding the solution of the equation is called "solving the equation".
By solving the equation, we can avoid the difficulty of reverse thinking and directly list the equations with the quantity to be solved. 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.
In mathematics, an equation is a statement 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. China's equation comes from the ancient mathematical monograph Nine Chapters Arithmetic, the eighth volume of which is called Equation. It means juxtaposition, which means to express the vertical form by calculation.
Volume 8 (1) is:
Today, there are three catches on the upper grain, two catches on the middle grain and one catch on the lower grain, which is actually thirty-nine fights; 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 medium millet, and low millet 1 bundle, a total of 34 buckets of millet.
First-class millet 1 bundle, second-class millet 2 bundles, third-class millet 3 bundles, millet * * * 26 buckets. How many barrels of millet can be produced by first-class millet 1 bundle, medium millet 1 bundle and low millet 1 bundle?
A: The grain on the top is one, nine and one quarter, the grain in the middle is one, four and one quarter, and the grain on the bottom is one, two and three quarters.
Liu Hui, a great mathematician in Wei and Jin Dynasties, made a lot of comments on Nine Chapters of Arithmetic around 263 AD, and introduced the equations: two things go further, three things go three ways, and all things are like numbers. Parallel to a line is called an equation. He also created a simpler "mutual multiplication and mutual elimination" solution equation.
Figure 1: Does a square include a circle?
Figure 2: Does a circle include a square?
Numbers: 3 and 1. Explain that the first picture r