Question

2х=-1/3 7х+5=0 2х-3=х-19 х+4=6+х-2 2,7-4х=х+4,2 3х-(7х-2)=18

Answer 1

Ответ:

Пошаговое объяснение:

2х = (-1/3)

х = (-1/3) : 2

х = (-1/3) * 1/2

х = (-1/6)

7х + 5 = 0

7х = -5

х = -5 : 7

х = (-5/7)

2х - 3 = х - 19

2х - х = - 19 + 3

х = - 16

х + 4 = 6 + х - 2

х - х = 6 - 2 - 4

0 = 0

Уравнение не имеет корней или решения

2,7 - 4х = х + 4,2

-4х - х = 4,2 - 2,7

-5х = 1,5

х = 1,5 : (-5)

х = -0,3

3х - (7х - 2) = 18

3х - 7х + 2 = 18

-4х = 18 - 2

-4х = 16

х = 16 : (-4)

х = - 4

Answer 2

Ответ:

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Answer 3

It looks like you've provided a list of equations. Do you need help solving them? I'd be happy to assist. Let's solve each equation step by step:

1. $2x = -\frac{1}{3}$ Divide both sides by 2: $x = -\frac{1}{6}$

2. $7x + 5 = 0$ Subtract 5 from both sides: $7x = -5$ Divide both sides by 7: $x = -\frac{5}{7}$

3. $2x - 3 = x - 19$ Subtract x from both sides: $x - 3 = -19$ Add 3 to both sides: $x = -16$

4. $x + 4 = 6 + x - 2$ Combine like terms: $x + 4 = 4 + x$ Subtract x from both sides: $4 = 4$ (This equation is an identity, meaning it holds true for all values of x. The solution set is all real numbers.)

5. $2.7 - 4x = x + 4.2$ Subtract x from both sides: $2.7 - 5x = 4.2$ Subtract 2.7 from both sides: $-5x = 1.5$ Divide both sides by -5: $x = -0.3$

6. $3x - (7x - 2) = 18$ Distribute the negative sign: $3x - 7x + 2 = 18$ Combine like terms: $-4x + 2 = 18$ Subtract 2 from both sides: $-4x = 16$ Divide both sides by -4: $x = -4$

So, the solutions for each equation are:

1. $x = -\frac{1}{6}$
2. $x = -\frac{5}{7}$
3. $x = -16$
4. This equation is an identity (all real numbers are solutions).
5. $x = -0.3$
6. $x = -4$