Question

7 – 2х = 9 – 3х 2. 11х = 6 + 5(2х – 1) 3. 6(2х – 3) – 3х = 2х – 4 4. 4(3х + 5) – 5(4х – 3) = 3 5. 5х – 3(4х – 1) = 7 – 2(7х + 2) 6. –5,6(x – 3) + 2,lx = –3,5x + 10

Answer 1

Ответ:

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Объяснение:

1) -2х+3х=9-7

х=2

2) 11х=6+10х-5

11х-10х=1

х=1

3) 12х-18-3х=2х-4

12х-2х-3х=18-4

7х=14

х(=14:7)=2

4) 12х+20-20х+15=3

-8х=3-15-20

-8х=-32

х=4

5) 5х-12х+3=7-14х-4

5х-12х+14х=7-4-3

7х=0

∅

6)-5,6х+16,8+2,1х=-3,5х+10

0х=-6,8

0

Answer 2

1) 2

2) 1

3)4

4)0

5)0

6)2,861

Answer 3

Let's solve each of the given equations step by step:

1. 7 – 2x = 9 – 3x

To solve this equation, we can start by simplifying both sides:

7 - 2x = 9 - 3x

Rearrange the equation:

-2x + 3x = 9 - 7

Combine like terms:

x = 2

Therefore, the solution to the equation is x = 2.

2. 11x = 6 + 5(2x – 1)

Expand the brackets:

11x = 6 + 10x - 5

Combine like terms:

11x - 10x = 6 - 5

x = 1

The solution to the equation is x = 1.

3. 6(2x – 3) – 3x = 2x – 4

Expand the brackets:

12x - 18 - 3x = 2x - 4

Combine like terms:

12x - 3x - 2x = -4 + 18

7x = 14

Divide both sides by 7:

x = 2

The solution to the equation is x = 2.

4. 4(3x + 5) – 5(4x – 3) = 3

Expand the brackets:

12x + 20 - 20x + 15 = 3

Combine like terms:

-8x + 35 = 3

Subtract 35 from both sides:

-8x = 3 - 35

-8x = -32

Divide both sides by -8:

x = 4

The solution to the equation is x = 4.

5. 5x – 3(4x – 1) = 7 – 2(7x + 2)

Expand the brackets:

5x - 12x + 3 = 7 - 14x - 4

Combine like terms:

-7x + 3 = -14x + 3

Add 14x to both sides:

7x + 3 = 3

Subtract 3 from both sides:

7x = 0

Divide both sides by 7:

x = 0

The solution to the equation is x = 0.

6. -5.6(x – 3) + 2.1x = -3.5x + 10

Expand the brackets:

-5.6x + 16.8 + 2.1x = -3.5x + 10

Combine like terms:

-5.6x + 2.1x + 3.5x = 10 - 16.8

0x = -6.8

Since 0 multiplied by any value is always 0, the equation has no specific solution.

Therefore, the given equation has no solution.