Question

омогите розвязать уровнение​

Answer 1

1) 4x+5.5=2x-2.5

4x-2x=-2.5-5.5

2x=-8

x=-4

Ответ: x=-4

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

4-2x-6=4x-20

-2x-4x=-20+6-4

-6x=-18

x=3

Ответ: x=3

3)    6x/7=(x-5)/2

12x=7x-35

12x-7x=-35

5x=-35

x=-7

Ответ: x=-7

Answer 2

Ответ:

1)

$4x + 5.5 = 2x - 2.5 \\ 4x - 2x = - 2.5 - 5.5 \\ 2x = - 8 \\ x = - 8 \div 2 \\ x = - 4$

2)

$4 - 2(x + 3) = 4(x - 5) \\ 4 - 2x - 6 = 4x - 20 \\ -2x -4x = - 20 - 4 + 6 \\ - 6x = - 18 \\ x = - 18 \div - 6 \\ x = 3$

3)

$\frac{6x}{7} = \frac{x - 5}{2} \\ 7(x - 5) = 2 \times 6x \\ 7x - 35 = 12x \\ 7x - 12x = 35 \\ - 5x = 35 \\ x = 35 \div - 5 \\ x = - 7$