The transformation of equation - 5x = 6 to x = - 6 / 5 is based on the fact that both sides of the equation are equal______ emergency

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• 1. What is the equation of 3x-2.5x = 1.9? Solve it in 90 minutes! I have limited time!
• 2. 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
• 3. 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
• 4. 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?
• 5. 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
• 6. 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 =
• 7. 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______ ．
• 8. (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
• 9. (a + b) square +_______ =(a-b) square (6x Cube - 12x square + x) / (- 3x) 21ab square × (- 2 / 7X square + x) / (- 3x)
• 10. 3x + 16 = 7x-40, find X
• 11. The equation x ^ 2 + 5x + n = 0 about X can be transformed into (x + P) ^ 2 = 9 by using the collocation method, so the equation x ^ 2-5x + n = 1 about X can also be transformed into (x + P) ^ 2 = 9 by using the collocation method
• 12. 5x + 4Y + Z = 0, 3x + y-4z = 1, x + y + Z = - 2. If we use a system of linear equations with three variables, we have to have a process~
• 13. 3x'3-7x'2 + 4 factorization
• 14. 3x-7+4x=6x-2．
• 15. 3x + 6x × 2 = 45, (x + 26) × 2 + 4x = 274,
• 16. How to solve the equation of 2 / 3x-1 / 6x = 15
• 17. 6X: 3x = 10:8 to solve the equation
• 18. When solving the equation x + 2x = 2 × 5 + 1, in the first step (), we get 3x + 11; in the second step (), we get x = 11 / 3
• 19. The following formula is a-3-2 / x = 3 B: 2x + (12-x) = 30 C: y-3x = 3 d. 2x3 + 5 = 9
• 20. Is 5x-3 = 6x-2 a linear equation with one variable