Question

1)10 – 2 · (7 – х) = 4 · (х – 7); 2)5 · (х – 4) – 9 = х – 1.

Answer 1

Ответ:

1) 12 2)7

Пошаговое объяснение:

1) 10 – 2 · (7 – х) = 4 · (х – 7);

10-14+2х=4х-28

10-14+28=4х-2х

24=2х

12=х

2)5 · (х – 4) – 9 = х – 1.

5х-20-9=х-1

5х-29=х-1

5х-х=29-1

4х=28

х=7

Answer 2

Как то так -.- можно лучший ответ ?

Answer 3

Let's solve these equations step by step:

1. 10 - 2(7 - x) = 4(x - 7)

First, distribute the numbers outside the parentheses:

10 - 2 * 7 + 2x = 4x - 28

Now, simplify the equation:

10 - 14 + 2x = 4x - 28

Combine like terms:

-4 + 2x = 4x - 28

Now, move the variables to one side and constants to the other side:

2x - 4x = -28 + 4

-2x = -24

Divide both sides by -2 to solve for x:

x = -24 / -2

x = 12

So, the solution to the first equation is x = 12.

2. 5(x - 4) - 9 = x - 1

First, distribute the 5 on the left side of the equation:

5x - 20 - 9 = x - 1

Now, simplify the equation:

5x - 29 = x - 1

Move the variables to one side and constants to the other side:

5x - x = -1 + 29

4x = 28

Divide both sides by 4 to solve for x:

x = 28 / 4

x = 7

So, the solution to the second equation is x = 7.