Question

-8х = 3,2 2/3х = 6 4 - 5х = 0 10х + 7 = 3 3 - 4х = х - 12 (х + 7) - (3х + 5) = 2 3(2х - 1) + 12 = х х/3 + х/4 = 7

Answer 1

-8х = 3,2
8х = -3,2
х = -0.4

2/3х = 6
х = 9

4 - 5х = 0
-5х = -4
5х = 4
х = 4/5 = 0.8

10х + 7 = 3
10х = 3 - 7
10х = -4
х = -4/10
х = -2/5 = -0.4

3 - 4х = х - 12
-4х - х = -12 - 3
-5х = -15
5х = 15
х = 3

(х + 7) - (3х + 5) = 2
х + 7 - 3х - 5 = 2
х - 3х = 2 - 7 + 5
-2х = 0
х = 0

3(2х - 1) + 12 = х
6х - 3 + 12 = х
6х + 9 = х
6х - х = -9
5х = -9
х = -9/5
х = -1 4/5 = -1.8

х/3 + х/4 = 7
х/3 + х/4 = 7/1
4х + 3х = 84
7х = 84
х = 12

Answer 2

Let's solve each equation step-by-step:

1. -8x = 3.2

We want to solve for x. We can start by dividing both sides by -8:

-8x/-8 = 3.2/-8

x = -0.4

Therefore, the solution is x = -0.4.

2. (2/3)x = 6

We want to solve for x. We can start by multiplying both sides by 3/2:

(2/3)x * 3/2 = 6 * 3/2

x = 9

Therefore, the solution is x = 9.

3. 4 - 5x = 0

We want to solve for x. We can start by subtracting 4 from both sides:

4 - 5x - 4 = 0 - 4

-5x = -4

Then, we can divide both sides by -5:

-5x/-5 = -4/-5

x = 0.8

Therefore, the solution is x = 0.8.

4. 10x + 7 = 3

We want to solve for x. We can start by subtracting 7 from both sides:

10x + 7 - 7 = 3 - 7

10x = -4

Then, we can divide both sides by 10:

10x/10 = -4/10

x = -0.4

Therefore, the solution is x = -0.4.

5. 3 - 4x = x - 12

We want to solve for x. We can start by adding 4x to both sides:

3 - 4x + 4x = x - 12 + 4x

3 = 5x - 12

Then, we can add 12 to both sides:

3 + 12 = 5x - 12 + 12

15 = 5x

Finally, we can divide both sides by 5:

15/5 = 5x/5

x = 3

Therefore, the solution is x = 3.

6. (x + 7) - (3x + 5) = 2

We want to solve for x. We can start by simplifying the left side:

x + 7 - 3x - 5 = 2

Then, we can combine like terms:

-2x + 2 = 2

Next, we can subtract 2 from both sides:

-2x + 2 - 2 = 2 - 2

-2x = 0

Finally, we can divide both sides by -2:

-2x/-2 = 0/-2

x = 0

Therefore, the solution is x = 0.

7. 3(2x - 1) + 12 = x

We want to solve for x. We can start by distributing the 3:

6x - 3 + 12 = x

Then, we can combine like terms:

6x + 9 = x

Next, we can subtract x from both sides:

6x + 9 - x = x - x

5x + 9 = 0

Finally, we can subtract 9 from both sides:

5x + 9 - 9 = 0 - 9

5x = -9

Then, we can divide both sides by 5:

5x/5 = -9/5

x = -1.8

Therefore, the solution is x = -1.8.

8. x/3 + x/4 = 7