Question

1027. 4x + 3 = x-9; 7x + 3 = 3x+27;42 - x = 2x + 9;2x - 19=8-3:3x-7=2x+3;20 + 3x = 4 -x.​

Answer 1

Відповідь:

Пояснення:

4x + 3 = x-9

4x-x=-9-3

3x=-12

x=-3

7x + 3 = 3x+27

7x-3x=27-3

4x=24

x=6

42 - x = 2x + 9

-x-2x=9-42

-3x=-33

x=11

2x - 19=8-3

2x=8-3+19

2x=24

x=12

3x-7=2x+3

3x-2x=3+7

x=10

20 + 3x = 4 -x

3x+x=4-20

4x=-16

x=-4

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Answer 2

To solve these equations, I'll go through each one step by step:

1. 4x + 3 = x - 9

First, let's isolate the variable x:

Subtract x from both sides: 3x + 3 = -9

Subtract 3 from both sides: 3x = -9 - 3 3x = -12

Now, divide by 3 to solve for x: x = -12 / 3 x = -4

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

2. 7x + 3 = 3x + 27

Subtract 3x from both sides: 4x + 3 = 27

Subtract 3 from both sides: 4x = 27 - 3 4x = 24

Now, divide by 4 to solve for x: x = 24 / 4 x = 6

The solution to the second equation is x = 6.

3. 42 - x = 2x + 9

Add x to both sides: 42 = 3x + 9

Subtract 9 from both sides: 33 = 3x

Now, divide by 3 to solve for x: x = 33 / 3 x = 11

The solution to the third equation is x = 11.

4. 2x - 19 = 8 - 3

Add 19 to both sides: 2x = 8 - 3 + 19 2x = 24

Now, divide by 2 to solve for x: x = 24 / 2 x = 12

The solution to the fourth equation is x = 12.

5. 3x - 7 = 2x + 3

Subtract 2x from both sides: x - 7 = 3

Add 7 to both sides: x = 3 + 7 x = 10

The solution to the fifth equation is x = 10.

6. 20 + 3x = 4 - x

Add x to both sides: 3x + x = 4 - 20 4x = -16

Now, divide by 4 to solve for x: x = -16 / 4 x = -4

The solution to the sixth equation is x = -4.