The equation of the first grade of junior high school is transformed from 2x-7 = 4x + 5 to - 2x = 12

The equation of the first grade of junior high school is transformed from 2x-7 = 4x + 5 to - 2x = 12

4X moved to the left and changed to - 4x,
-7 to the right and change to 7,
That is, 2x-4x = 5 + 7,
That is - 2x = 12

1. If 2x = - 4, then x = - 2, this deformation is on both sides of the equation (), and its basis is () 2. If 4x = 3x + 7, then 4x - () = 7 according to the equation
If x = - 2, then () = - 6 according to the property of the equation and how to deform

1. If 2x = - 4, then x = - 2, this deformation is on both sides of the equation (divided by 2), and its basis is that (both sides of the equation multiply the same number (or divide by) the same non-zero number (or formula), the result is still the equation.)
2. If 4x = 3x + 7, then 4x - (3x) = 7 according to which property of the equation and how to deform it?
4x-（3x）=7
According to the nature of the equation: both sides of the equation plus (or minus) the same number (or formula), the result is still the equation
Deformation method: subtract 3x from both sides of the equation
3. - 3x = 8, then x = () according to which property of the equation and how to deform it
x=(-8/3)
According to the nature of the equation: both sides of the equation multiply the same number (or divide by) the same number (or formula), the result is still the equation
Deformation method: divide both sides of the equation by - 3
4. If x = - 2, then () = - 6 according to the property of the equation and how to deform it
(3x)=-6
According to the nature of the equation: both sides of the equation multiply the same number (or divide by) the same number (or formula), the result is still the equation
Deformation method: multiply both sides of the equation by 3