Simple equation
related notion
Homotopy equation
meaning
Equation ax(×b)= c
equation
Equation with unknown number
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basic approach
Add or subtract the same appropriate number on both sides of the equation; Multiply or divide both sides of the equation at the same time (except 0)
The eighth part of the simple equation (except the ninth part) is also numbered appropriately. Finally, the solution to the problem was found.
To judge whether it is "appropriate" to add (or subtract), multiply (or divide) the same numbers on both sides in the process of solving the equation, the key is to see whether the first step operation can only make one side of the equation contain numbers with unknowns, and whether the second step operation can make one side of the equation only have unknowns, that is, to find the result.
Solving application problems with simple equations is based on column algebra. The key is to select appropriate unknowns on the basis of clarifying the meaning and relationship of various quantities in the topic sentence, then express the sentences related to quantities by algebra, and finally list the equations and solve them by using the equality relationship in the topic.
Equation: An equation with an unknown number.
The value of the unknown quantity that makes the left and right sides of the equation equal is called the "solution" of the equation. For example, x= 150 is the solution of the equation 100+x=250. The process of solving an equation is called solving an equation.
If the solutions of two equations are the same, then these two equations are called homosolution equations.
Same solution principle
Adding or subtracting the same number or the same equation on both sides of the equation is the same solution equation as the original equation.
2. The equation obtained by multiplying or dividing the same number whose two sides are not zero is the same as the original equation.
An important method to solve the application problem of linear equation with one variable;
1. Examine the questions carefully.
Analysis of known and unknown quantities.
[13] Find the equivalence relation.
4. Set an unknown number.
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Solve equations.
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