What kind of equation is obtained by translating the linear equation 2x-y + 4 = 0 down 3 units? How about y = 2x + 4 moving down 3 units?

Let me tell you a general method: if you move a unit to the left, just substitute (x + a) for X in the equation; if you move a unit to the right, just substitute (x-a) for X in the equation; if you move a unit up, just substitute (Y-A) for y in the equation

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1. 2X+15=54
2. Given that the root of equation 2x-7 / 8 (x + a) + 1 / 6 (x-a) = 8 is four times larger than that of equation 1 / 2-x-3 / 3 = 1, find the value of A
3. If the roots of the equation lgx = 8-2x x ∈ (k, K + 1), K ∈ Z, then k = () A. 2B. 3C. 4D. 5
4. Explore the value of a, so that the root of the known equation 2x + a = 7 + X is (1) positive number; (2) positive even number
5. When a = (), the solution of equation a (x-1) = 2X-4 is x = 3
6. The solution equation: 4 (X-2) (x + 5) - (2x-3) (2x + 1) = 5
7. It is known that the solution of the equation 1 / 2x = - 2 about X is 2 smaller than that of the equation 5x-2a = 0 about X. try to solve the equation 1 / ay-15 = 0 about y
8. How much is root 1.2 times root 54 times root 0.6
9. X * y is 4x + 5Y divided into axy, and 1 * 2 = 1, find the value of 2 * 3 There must be an operation process, and every step must have one
10. Let x, y, a be rational numbers, define x * y = axy4x + 5Y, and 1 * 2 = 1, try to find the value of 2 * 3
11. 2*（x+2x）=54
12. How to solve the equation: 2x + 4 (21-x) = 54?
13. After the line y = 2x is translated 2 units along the positive direction of X axis, the expression is?
14. If x = - 2 is the root of the equation - ax + B = - 1 - 2x, what is the value of the algebraic expression 4A + 2B + 1
15. If x = - 2 is the root of the equation: 2x2-ax-b = 3-2x, then 3-4A + 2B=______ ．
16. If x = - 2 is the equation - ax + B = - 1-2x, then the value of the algebraic expression 4A + 2B + 1 is
17. If the root of the equation for X: 2x ^ 2-ax-b = 3-2x is - 2, then 3-4A + 2B =? As soon as possible! ^This symbol is To the power of
18. Given that x = 1 is the solution of the equation 2x-2 = 1 / 3 (x-a), what is the solution of the equation a (y + 4) = 2ay + 4A about y?
19. If the solutions of the equation X-1 / 3-1 = 3x-2x + 1 / 2 and the equation x + 6x-a / 3 = A / 2x are reciprocal, the value of a is obtained
20. It is known that the solutions of the equations (x-m) / 2 = x + m / 3 and (2x + 1) / 3 = 3x-2 about X are reciprocal to each other, and the value of M is obtained