Question

25 • 2x - 3) - 13 = -0,5​

Answer 1

Вы не написали, где стоит открывающая скобка.
Если скобка стоит так
(25 • 2x - 3) - 13 = -0,5
то
50х - 3 = -0,5 + 13
50х = -0,5 + 13 + 3
50х = 16 - 0,5
50х = 15,5
х = 15,5 : 50
х = 0,31

Если скобка стоит так:
25 • (2x - 3) - 13 = -0,5
то
25 • (2х - 3) = -0,5 + 13
25 • (2х - 3) = 12,5
2х - 3 = 12,5 : 25
2х - 3 = 0,5
2х = 0,5 + 3
2х = 3,5
х = 3,5 : 2
х = 1,75

Answer 2

To solve the equation 25(2x - 3) - 13 = -0.5, follow these steps:

1. Distribute the 25 on the left side of the equation: 25 * 2x - 25 * 3 - 13 = -0.5

2. Simplify the equation: 50x - 75 - 13 = -0.5

3. Combine like terms by adding the constants on the left side: 50x - 88 = -0.5

4. Now, isolate the variable by adding 88 to both sides of the equation to get x by itself on the left side: 50x = -0.5 + 88

5. Add -0.5 to 88: 50x = 87.5

6. Finally, divide both sides by 50 to solve for x: x = 87.5 / 50

Now, simplify the fraction by dividing both the numerator and denominator by their greatest common factor, which is 2:

x = (87.5 / 2) / (50 / 2) x = 43.75 / 25

x = 1.75

So, the solution to the equation is x = 1.75.