Question

8х-5=х-40 7т=21=т-3 0.3р-5=6-0.7р 8.31 к-71=1.11к+1

Answer 1

1) 8х - 5 = х - 40
8х - х = -40 + 5
7х = -35
х = (-35) ÷ 7
х = -5.
Ответ : х = -5.

2) 7т - 21 = т - 3
7т - т = -3 + 21
6т = 18
т = 18 ÷ 6
т = 3.
Ответ : т = 3.

3) 0,3р - 5 = 6 - 0,7р
0,3р + 0,7р = 6 + 5
р = 10
Ответ : р = 10.

4) 8,31к - 71 = 1,11к + 1
8,31к - 1,11к = 1 + 71
7,2к = 72
к = 72 ÷ 7,2
к = 10.
Ответ : к = 10.

Удачи))))

Answer 2

Решение приведено на фотографии

Answer 3

To solve these equations, we'll isolate the variable on one side of the equation. Let's solve them one by one:

1. 8х - 5 = х - 40

To isolate x, we'll move all the terms with x to one side and constants to the other side:

8x - x = -40 + 5

Combine the x terms:

7x = -35

Now, divide both sides by 7 to solve for x:

x = -35 / 7

x = -5

2. 7т = 21 + т - 3

To isolate т, we'll move all the terms with т to one side and constants to the other side:

7т - т = 21 - 3

Combine the т terms:

6т = 18

Now, divide both sides by 6 to solve for т:

т = 18 / 6

т = 3

3. 0.3р - 5 = 6 - 0.7р

To isolate р, we'll move all the terms with р to one side and constants to the other side:

0.3р + 0.7р = 6 + 5

Combine the р terms:

1р = 11

Now, divide both sides by 1 to solve for р:

р = 11

4. 8.31к - 71 = 1.11к + 1

To isolate к, we'll move all the terms with к to one side and constants to the other side:

8.31к - 1.11к = 1 + 71

Combine the к terms:

7.2к = 72

Now, divide both sides by 7.2 to solve for к:

к = 72 / 7.2

к = 10

So, the solutions to the given equations are:

1. x = -5
2. т = 3
3. р = 11
4. к = 10