Question

(9х+4)*0,2-1,8*(2х-5)-(-0,8-1,8х)=9

Answer 1

1,8x+0,8-3,6x+9+0,8+1,8x=9
1,8x+0,8-3,6x+0,8+1,8x=0
1,6=0
Ответ: утверждение ложно для любого значения

Answer 2

To solve the equation (9x + 4) * 0.2 - 1.8 * (2x - 5) - (-0.8 - 1.8x) = 9, we can follow these steps:

1. Distribute the coefficients: 1.8 * (2x - 5) becomes 3.6x - 9. -(-0.8 - 1.8x) becomes 0.8 + 1.8x. The equation becomes: (9x + 4) * 0.2 - (3.6x - 9) - (0.8 + 1.8x) = 9.

2. Simplify the equation: Distributing 0.2 to (9x + 4) gives 1.8x + 0.8. The equation simplifies to: 1.8x + 0.8 - 3.6x + 9 - 0.8 - 1.8x = 9.

3. Combine like terms: The equation further simplifies to: (1.8x - 3.6x - 1.8x) + (0.8 - 0.8 + 9) = 9. Combining like terms gives: -3.6x + 9 = 9.

4. Move constants to one side and variables to the other: Subtracting 9 from both sides of the equation: -3.6x = 0.

5. Solve for x: Dividing both sides of the equation by -3.6: x = 0.

Therefore, the solution to the equation (9x + 4) * 0.2 - 1.8 * (2x - 5) - (-0.8 - 1.8x) = 9 is x = 0.