Question

3,9-2х+4(5х-1,7)= 4,8х+49,9

Answer 1

Ответ:

4

Пошаговое объяснение:

3,9 - 2х + 20х - 6,8 = 4,8х +49,9

18х -4,8х = 49,9 - 3,9 +6,8

13,2х = 52,8

х = 52,8/13,2

х = 4

Answer 2

To solve the equation 3.9 - 2x + 4(5x - 1.7) = 4.8x + 49.9, you need to simplify and isolate the variable x. Here's the step-by-step solution:

1. Distribute the 4 on the left side of the equation:

3.9 - 2x + 4 * 5x - 4 * 1.7 = 4.8x + 49.9

2. Now, simplify the equation by multiplying the numbers:

3.9 - 2x + 20x - 6.8 = 4.8x + 49.9

3. Combine like terms on both sides of the equation. On the left side, combine the -2x and 20x:

3.9 + 18x - 6.8 = 4.8x + 49.9

4. Next, add 6.8 to both sides of the equation to get rid of the constant term on the left side:

3.9 + 18x - 6.8 + 6.8 = 4.8x + 49.9 + 6.8

5. Simplify:

3.9 + 18x = 4.8x + 56.7

6. Now, subtract 4.8x from both sides to isolate the x terms on one side of the equation:

3.9 + 18x - 4.8x = 56.7

7. Combine like terms on both sides of the equation:

13.2x + 3.9 = 56.7

8. Finally, subtract 3.9 from both sides to isolate the term with x:

13.2x = 56.7 - 3.9

9. Simplify the right side:

13.2x = 52.8

10. Divide both sides by 13.2 to solve for x:

x = 52.8 / 13.2

x = 4

So, the solution to the equation is x = 4.