1)

[tex]4x + 5.5 = 2x - 2.5 \\ 4x - 2x = - 2.5 - 5.5 \\ 2x = - 8 \\ x = - 8 \div 2 \\ x = - 4[/tex]

2)

[tex]4 - 2(x + 3) = 4(x - 5) \\ 4 - 2x - 6 = 4x - 20 \\ - 2x - 4x = - 20 + 2 \\ - 6x = - 18 \\ 6x = 18 \\ x = 18 \div 6 \\ x = 3[/tex]

3)

[tex] \frac{6x}{7} = \frac{x - 5}{2} \\ 2 \times 6x = 7(x - 5) \\ 12x = 7x - 35 \\ 12x - 7x = - 35 \\ 5x = - 35 \\ x = - 35 \div 5 \\ x = - 7[/tex]

Verified answer

Пошаговое объяснение:

4х + 5,5 = 2х - 2,5

4х - 2х = -2,5 - 5,5

2х = -8

х = -8 : 2

х = -4

4 - 2(х + 3) = 4(х - 5)

4 - 2х - 6 = 4х - 20

-2х - 2 = 4х - 20

-2х - 4х = -20 + 2

-6х = -18

х = -18 : (-6)

х = 3

6х/7 = (х - 5)/2

7(х - 5) = 2 * 6х

7х - 35 = 12х

7х - 12х = 35

-5х = 35

х = 35 : (-5)

х = -7