Is an equation that uses other letters to represent an unknown number

An equation with unknowns is called an equation. No matter what letter is used, the expression of "equation" in this proposition is wrong. Just replace it with "equation"

RELATED INFORMATIONS

1. Solving the fractional equation: X-1 / x + 2 = x-3 / x + 4
2. m-2m-3m+4m-5m-6m= m-2m-3m+4m-5m-6m+···+2002m-2003m-2004m
3. How to decompose factor X'2 + 3ax + 2A'2-a-1 = 0?
4. Factorization: X * x + 3ax-10a * A-X + 2A
5. By factoring the algebraic formula X3 + (2a + 1) x2 + (A2 + 2a-1) x + (A2-1), we obtain______ ．
6. Help me solve the factorization band process (x + y) (X-Y) a ^ - 4A + 4 m ^ n-9n x ^ + 4x + 2 x ^ + XY - 4B ^ + 2Ab 3ax-12bx + 3x Cubic of 6ab-2a ^ B ^ + cubic B of 4A 2(x-y)-(x-y)^ 6(m-n)^+3(m-n) Cube of 4A ^ B ^ + 6ab -Cube-21a of 49A ^ + 7ab 7(a-2)^+14(a-2) a^b(x-y)-ab(y-x)^ a^b-3ab Cube of XY + cube of X Y 8abc+4bc^ 6ab+8b-bd 14mnx+7mx+21nx 2m cube n + 16m ^ n ^ + 4Mn cube a(m+n)-6(m+n) (a+b)(a-b)-(b+a) Factorization with the method of providing factor (x + y) (X-Y) above a^-4a+4 m^n-9n x^+4x+2 x^+xy -4b^+2ab 3ax-12bx+3x
7. When a, the solution set of the linear inequality (A-1) with respect to x greater than 1 is that x is less than 1 / 1 of A-1
8. If we use the substitution method to deal with the binary linear equations whose absolute values of the coefficients of two unknowns are not 1, it is the key to solve the application problems of binary linear equations
9. When the coefficient of an unknown number in the two equations of a system of linear equations of two variables______ Or_________ Or___________ The method of addition, subtraction and elimination is often used
10. In maple, how to simplify the symbolic equation by substituting it into the equation? It's not a complicated problem Let z = a + BX / y, where M = x / y. find Z (m) Using Maple, we should get z = a + BM But which command of maple?
11. Several problems should be paid attention to in solving practical problems by listing equations: (1) the key to solving problems is to find (), and then list equations to form equations; (2) the way to solve unknowns In general, there are two kinds of methods: direct method and () method; (3) pay attention to the unit before and after the same unknown number (), the unit on both sides of each equation (), the unit of answer and question (); (4) when solving practical problems, pay special attention to (), not only to check whether the solutions are suitable for (), but also to check whether these solutions are consistent with ()
12. As shown in the figure, after the triangle on the left is reduced to a certain scale, the triangle on the right can be obtained. Find the unknown X. unit (CM)
13. How to calculate with unknown number in denominator, such as 1 / x + 1 / x + 5 = 1 / 6
14. If the bracket x + y = 3, X-my = 2 and the bracket X-Y = 1, nx-y = 2 have the same solution, find the value of M, n?
15. Ask for help to solve an applied problem of linear equations with 2 variables (set two different unknowns) The distance between a and B is 42km. If two people are walking opposite each other at the same time, they will meet in two hours. If B starts in the opposite direction, a will catch up immediately and use 14 to disappear to catch up, so as to find the speed of a and B
16. How do I use the input method to type the multiplication sign, division sign, and other mathematical punctuation marks?
17. For a project, it takes 150 days for team a to complete it alone, and 180 days for team B. now we plan to cooperate with two teams. Team a takes two days off for five days, and team B takes one day off for six days?
18. A math problem, do not have two unknown equations, to sixth grade pupils to accept the method, by the way, explain, hard you! In order to save resources and protect the environment, a city's Electric Power Bureau has been replacing Gufeng meters for residents for free since January this year, and then stipulates that: from 8:00 to 21:00 every day, 0.80 yuan per kilowatt hour ("peak electricity" price); from 21:00 to 8:00 the next day, 0.55 yuan per kilowatt hour (valley electricity price). At present, residents who do not use Gufeng meters charge 0.75 yuan per kilowatt hour, In March, we paid 91.5 yuan for electricity. After calculation, we can save 6 yuan by using peak valley electricity meter. 1. How many kilowatt hours does the small owner use in March? 2. How many kilowatt hours did the "peak electricity" and "valley electricity" use in March? We can't find it online, so please help us. It's hard to get the answer before 11 o'clock
19. The multiplier is 10, the product is 630 more than the multiplicand, the multiplicand is______ ．
20. It's forbidden to use arithmetic. It's required to write out the solution and the answer 1. Students went to Beihai Park to row a boat. It cost 565 yuan to rent 32 big boats and 32 small boats. It is known that the rental price of each big boat is 20 yuan, and that of each small boat is 15 yuan. How many big boats and small boats did you rent? 2. Students go boating in Beihai Park. The rental price of each big boat is 20 yuan, and that of each small boat is 15 yuan, which costs 360 yuan. It is known that the number of big boats rented by students is 1.5 times of that of small boats. How many big boats and small boats did you rent? 3. Students go boating in Beihai Park. The rental price of each big boat is 20 yuan, and that of each small boat is 15 yuan. It costs 680 yuan in total. It is known that the number of big boats rented by students is 1.5 times that of small boats. How many big boats and small boats did you rent? 4. Students go boating in Beihai Park. The rental price of each big boat is 20 yuan, and that of each small boat is 15 yuan. The number of big boats rented by students is 1.5 times that of small boats. It is known that the cost of renting big boats is 180 yuan more than that of renting small boats. How many big boats and small boats have you rented?