![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
In a series of equations, the unknowns are generally on the left side of the equation,
absolutely right
When Xiao Ming solves the equation 2x + a = 3x-1 about X, when he shifts the term to the left, he moves the unknown number to the left, and when he shifts the constant term to the right, a shifts the term without changing sign, and the value of the solution is x = 2?
By solving the equation 2x + a = 3x-1, the correct solution is x = a + 1. Xiaoming does not change the sign when he shifts a term, which is equivalent to treating a as - A. then, replace a with - A and substitute it into the original solution. If there are 2 = - A + 1 solutions, we can get a = - 1. By substituting a = - 1 into the correct solution, we can get that the correct solution of the equation is x = 0
Term shifting: move the term with unknowns to one side of the equation, and the term without unknowns to the other side of the equation
The position of a variable is not called a shift
Fill in the blanks
Change the symbol
The element in the linear equation of one variable means the unknown. Why is the unknown expressed by "element"?
If we must explain that "Yuan" is the source, solving the equation is the process of tracing the source
In fact, it's a man-made rule. It's a name given by people, and it doesn't have any origin
I hope my answer will help you
RELATED INFORMATIONS
- 1. In the definition of linear equation with one variable, "all formulas with unknowns are integral" is illustrated with specific examples
- 2. When there are two unknowns or more unknowns in a linear equation of one variable, For example: 4 / 2x = 5x - 3 Find x
- 3. Two equations two unknowns X / 3.51 + Y / 2.78 = 0.62 X / (x + y) = 0.3 every step in the process of solving this equation is written out There is a very simple step. I just can't remember it,
- 4. Solve the equation [0.4 + x] × 6 = 5.40.4 + X. This is an unknown number × 6 is a multiplication sign
- 5. 3 / 4x minus 25% is 12
- 6. If (2x-6) ^ (- 3) is meaningful, find the value range of X
- 7. How much is 90-50 degrees and 39 minutes
- 8. What are 19 and 2? 1 composite 2 prime 3 odd 4 even piease
- 9. 1 27 35 31 41 49 111 55 79 81 213 which is prime and which is composite
- 10. Simplification: (1) |3x-2 | + |2x + 3 |; (2) |x-1 | - 3 | + |3x + 1 |
- 11. "Ab is the moving chord on the parabola y = x ^ 2, and | ab | = a (a is constant and a > = 1), then the nearest distance between the midpoint m of the chord AB and the X axis"
- 12. It is stipulated that an operation a ⁃ B = AB + A-B, where a and B are real numbers, then a ⁃ B + (B-A) ⁃ B equals () A. a2-bB. b2-bC. b2D. b2-a
- 13. Write out a linear equation with one variable so that its solution is 5 and the coefficient of the term with unknowns is 4 / 5 In a hurry
- 14. Given X & sup3; - 16x & sup2; + mx-n divided by X & sup2; - 2x + 3, the remainder is - 18x + 15. Try to find the value of M, n
- 15. Given x = 1 / x, find the value of (X & # 178; - 5 / X-1 + 1) multiplied by X & # 179; - 1 / X & # 178; - 2x divided by (x + 3)
- 16. Given that the result of (x 2 + m x + n) (x + 1) does not contain x 2 term and X term, find the value of M, n
- 17. Function substitution method problem! Do not understand: F (x + 1) = x & # 178; + 3 find f (x) substitution, use t = x + 1, and finally write t back to x, then Why can't we replace x + 1 with X first?
- 18. How to understand the substitution method in high school function, for example
- 19. If f (x-1) = 2x & # 178; + 1, find the analytic expression of F (x)
- 20. Given f (x) = x & # 178; + 4x + 3, find the minimum g (T) and maximum H (T) of F (x) in the interval [T, t + 1] There is another problem, how to get ± 2.5 I'm so confused. I don't understand.