Question

2x-4=5x+7 (3x+2) -4=-2(x-1)

Answer 1

Ответ:

1) $-3\frac{2}{3}$

2) 0,8

Объяснение:

1) 2x - 4 = 5x + 7

2x - 5x = 7 + 4

-3x = 11

x = -11/3

Ответ: $-3\frac{2}{3}$

2) (3х + 2) - 4 = -2(x - 1)

3x + 2 - 4 = -2x + 2

3x + 2x = 4 - 2 + 2

5x = 4

x = 4/5

Ответ: 0,8

Answer 2

Let's solve each equation step by step:

1. 2x - 4 = 5x + 7

   First, let's isolate the variable x on one side of the equation:

   Subtract 2x from both sides:

   -4 = 3x + 7

   Now, subtract 7 from both sides:

   -4 - 7 = 3x

   -11 = 3x

   Finally, divide both sides by 3 to solve for x:

   x = -11/3

2. (3x + 2) - 4 = -2(x - 1)

   First, distribute the -2 on the right side of the equation:

   3x + 2 - 4 = -2x + 2

   Now, combine like terms on both sides:

   3x - 2 = -2x + 2

   Add 2x to both sides to isolate the x terms on one side:

   3x + 2x - 2 = 2

   Combine the x terms:

   5x - 2 = 2

   Add 2 to both sides:

   5x - 2 + 2 = 2 + 2

   5x = 4

   Finally, divide both sides by 5 to solve for x:

   x = 4/5

So, the solutions to the two equations are:

1. x = -11/3
2. x = 4/5