Question

0.4(2x-7)+1.2(3x+7)=1.6x

Answer 1

Ответ:

0.4(2x-7)+1.2(3x+7)=1.6x

0.8x-2,8+3.6x+8,4=1.6x

4.4x+5,6=1.6x

2.8x=-5,6

х=-2

Все.

Я Оля Барсова)

Answer 2

To solve the equation 0.4(2x - 7) + 1.2(3x + 7) = 1.6x, follow these steps:

1. Distribute the constants on the left side of the equation:

   0.8x - 2.8 + 3.6x + 8.4 = 1.6x

2. Combine like terms on the left side of the equation:

   (0.8x + 3.6x) - (2.8 + 8.4) = 1.6x

   4.4x - 11.2 = 1.6x

3. Move the 1.6x term to the left side by subtracting 1.6x from both sides of the equation:

   4.4x - 1.6x - 11.2 = 0

   (4.4x - 1.6x) - 11.2 = 0

   2.8x - 11.2 = 0

4. Now, add 11.2 to both sides of the equation to isolate the variable on the left side:

   2.8x - 11.2 + 11.2 = 0 + 11.2

   2.8x = 11.2

5. Finally, divide both sides by 2.8 to solve for x:

   (2.8x) / 2.8 = 11.2 / 2.8

   x = 4

So, the solution to the equation 0.4(2x - 7) + 1.2(3x + 7) = 1.6x is x = 4.