How to solve the equation "5 (2x + 0.4) = 5x"? 5（2X+0.4)=5X

(1)5（2X+0.4)=5X
2X + 0.4 = x (divide both sides by 5)
X = - 0.4 {if the term changes sign, X changes to the left and becomes - x, then 2x + (- x) = x}
Similarly, 0.4 becomes - 0.4
So x = - 0.4

RELATED INFORMATIONS

1. 1 / 5x + 20 = 2x / 5, how to solve such an equation
2. How to use the equation (x + 8) △ x = 3
3. Set up equations and calculate: 19.8 is 8.3 times more than 2.3 times of X, find X
4. How to calculate the equation when 3 * (12-x) = 24?
5. How to calculate equation 18 (x-3.2) = 1.8
6. The area of a body is 11 / 24 square meters. The upper bottom is 5 / 8, the lower bottom is 3 / 4, and the height is X
7. How to calculate the equation 2x + 4 (3x) = 280
8. Calculation equation 4-1 / 2x = - x
9. How to solve and test the equation of 4x + 1.5 = 2.5
10. 4X + 24 =? (solved by equation) You can answer in words 4X + 24 = 35 (use the equation to solve) do not write the number of copies, please write the number.
11. (9.7 + 2x) △ 2 = (5.5 + 5x) △ 3 equation
12. How to use the method of extracting common factor to solve the equation: (2x-1) * (x + 5) - (1-2x) * (1-x) = 6
13. The solution of equation 2x-6 = 0 is______ ．
14. Solve the equation 2x + (2.4-x) × 4 = 1.6
15. Solving equation 2 (2x + 6) x + 4 = - 5 with formula method
16. Solving equation 3.2x-1.6 = 2.4
17. Please refer to the following example to solve the equation 2x-lx-1l-1 = 0. Example: solve the equation 2x-lxl-2 = 0 (1) when x is greater than or equal to 0, The original equation can be reduced to 2x-x-2 = 0, and the solution is x = 2 (2) When x < 0, the original equation can be reduced to 2x + X-2 = 0, and the solution is x = 2 / 3 Because x < 0, so x = 2 / 3 does not meet the conditions, rounding off, so the solution of the original equation is x = 2
18. Equation 2x = 5x * 3 / 4-28
19. Solve the equation 2x + x = 240, 5x-x = 28
20. It is known that the difference between the solution of the equation 2x + 3 = x + K and the solution of the equation x-3 = 5K is 6, and K =?