-3x+2+7x=?

RELATED INFORMATIONS

• 1. 7x+3.2=3x+6.4
• 2. It is known that the equation (a2-a) x2 + ax + A2-1 = 0 (1) when a is a value, the equation is a linear equation of one variable; (2) when a is a value, the equation is a quadratic equation of one variable; (3) when the equation has two real roots, one of which is 0, the value of a is obtained
• 3. To solve the linear equation of one variable with respect to X: ax-b = bx-a (a is not equal to b) Urgent help
• 4. On the case of the solution of the linear equation with one variable of X: it is reduced to the simplest equation AX = B 1, when a is not equal to 0, there is a unique solution x = B / a 2, when a = 0 and B is not equal to 0 When a = 0, B = 0, any number is the solution of the equation If the equation a (2x + b) = 12x + 5 about X has innumerable solutions, then a = () B equals () process
• 5. If ax ^ b-3-5 = 0 is a linear equation of one variable with respect to x, then a is not equal to X___ B is not equal to___ .
• 6. If the equation 2 (x-3) + AX2 = BX about X is a linear equation of one variable, then a and B satisfy () A. A = 0 and B ≠ 0b. A = - 1 and B ≠ 0C. A = 0 and B ≠ 2D. A = 1 and B ≠ 2
• 7. m. N is the coefficient, and the difference between MX + 2xy-x and 3x ^ 2-2nxy + 3Y does not contain quadratic term, so the value of m ^ 2-3n can be obtained
• 8. If the expansion of (x 2 + m x + 8) (x 2-3 x + n) does not contain x 3 and x 2 terms, the values of M and N are obtained
• 9. (x ^ 2 + MX + n) (x ^ 2-3x + 2) does not contain x ^ 2, X term, find the value of M and n
• 10. If the expansion of (x + MX + 8) (x-3x + n) does not contain x ^ 3 term and the constant term is 64, find the value of M, n
• 11. 3x + 16 = 7x-40, find X
• 12. (a + b) square +_______ =(a-b) square (6x Cube - 12x square + x) / (- 3x) 21ab square × (- 2 / 7X square + x) / (- 3x)
• 13. (1/3-0.25)x=1.2 5/7x-1/3x=24 5 / 8 of a number is 6 more than 123 / 4. What's the number
• 14. It is known that the values of X and Y in the solution of the system of linear equations ax + y + 2 = 0x + ay − a + 3 = 0 are opposite to each other, then the value of a is______ ．
• 15. In the solution of the system of quadratic equations 3x + 4Y = 1, (A-1) x + ay = 3, if the values of X and y are equal, what is a =
• 16. It is known that 5x + 7 = 4. If the value of 5x-2 is required, what deformation should be made? What is the value of 5x-2
• 17. Given that 5x + 7 = 4, we don't understand the equation. If we want the value of 5x-2, how should we deform it? What is the value of 5x-2?
• 18. To solve equation 45 (54x-30) = 7, the following deformation is simpler () A. If you multiply both sides of the equation by 20, you get 4 (5x-120) = 140B. If you divide both sides of the equation by 45, you get 54x-30 = 354c. If you remove the brackets, you get x-24 = 7d
• 19. To solve equation 45 (54x-30) = 7, the following deformation is simpler () A. If you multiply both sides of the equation by 20, you get 4 (5x-120) = 140B. If you divide both sides of the equation by 45, you get 54x-30 = 354c. If you remove the brackets, you get x-24 = 7d
• 20. What is the equation of 3x-2.5x = 1.9? Solve it in 90 minutes! I have limited time!