Question

3(х-2)=х+2? (7х+1)-(9х+4)=5? 5-2(х-1)=4-х? 14х-14=7(2х-3)+7? 3,4+2у=7(у-2,3)=?

Answer 1

Ответ: 3(х-2)=х+2 2) (7х+1)-(9х+4)=5 3) 5-2(х-1)=4-х 4) 14х-14=7(2х-3)+7 5) 3,4+2у=7(у-2,3)​.

Пошаговое объяснение:

Пошаговое объяснение:

1) 3 * (х - 2) = х + 2

3х - 6 = х + 2

3х - х = 2 + 6

2х = 8

х = 8 : 2

х = 4

2) (7х + 1) - (9х + 4) = 5

7х + 1 - 9х - 4 = 5

-2х = 5 - 1 + 4

-2х = 8

х = 8 : (-2)

х = -4

3) 5 - 2 * (х - 1) = 4 - х

5 - 2х + 2 = 4 - х

-2х + х = 4 - 5 - 2

-х = -3

х = 3

4) 14х - 14 = 7 * (2х - 3) + 7

14х - 14 = 14х - 21 + 7

14х - 14х = 14 - 21 + 7

0 = 0

5) 3,4 + 2у = 7 * (у - 2,3)

3,4 + 2у = 7у - 16,1

2у - 7у = -16,1 - 3,4

-5у = -19,5

у = -19,5 : (-5)

у = 3,9​

Answer 2

Ответ:

1)4 2)-4 3)3 4)0 5)3,9

Answer 3

Let's solve each equation step by step:

1. $3(x - 2) = x + 2$:

   Distribute the 3 on the left side: $3x - 6 = x + 2$

   Subtract x from both sides: $2x - 6 = 2$

   Add 6 to both sides: $2x = 8$

   Divide both sides by 2: $x = 4$

2. $(7x + 1) - (9x + 4) = 5$:

   Distribute the negative sign in the parentheses on the left side: $7x + 1 - 9x - 4 = 5$

   Combine like terms: $-2x - 3 = 5$

   Add 3 to both sides: $-2x = 8$

   Divide both sides by -2: $x = -4$

3. $5 - 2(x - 1) = 4 - x$:

   Distribute the -2 on the left side: $5 - 2x + 2 = 4 - x$

   Simplify and combine like terms: $7 - 2x = 4 - x$

   Add 2x to both sides: $7 = 4 + x$

   Subtract 4 from both sides: $3 = x$

4. $14x - 14 = 7(2x - 3) + 7$:

   Distribute the 7 on the right side: $14x - 14 = 14x - 21 + 7$

   Combine like terms: $14x - 14 = 14x - 14$

   Subtract $14x$ from both sides: $-14 = -14$

   This equation is true for all values of $x$.

5. $3.4 + 2y = 7(y - 2.3)$:

   Distribute the 7 on the right side: $3.4 + 2y = 7y - 16.1$

   Subtract $2y$ from both sides: $3.4 = 5y - 16.1$

   Add 16.1 to both sides: $19.5 = 5y$

   Divide both sides by 5: $y = 3.9$

Please note that I've rounded decimal numbers to one decimal place for clarity.