Question

1. 2(х+1)=5-(4-2х)
2. 6-2(3-х)=(2-3х)
3. 5х + 3 3х
--------- + ---------- =6


2 4
4. 16-х 2х-1
------- = -------- - 4
3 5​

Answer 1

Ответ:

Пошаговое объяснение:

1) 2(х+1)=5-(4-2х)

2x + 2 = 5 - 4 + 2x

2x + 2 = 1 + 2x

2x - 2x = 1 - 2

0 = -1

0 ≠ -1

уравнение не имеет корней

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2) 6-2(3-х)=(2-3х)

6 - 6 + 2x = 6 - 9x

2x + 9x = 6

11x = 6

x = 6 : 11

x = 6/11

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3) (5x+3)/2 + 3x/4 = 6    |*4

2(5x+3) + 3x = 24

10x + 6 + 3x = 24

13x = 24-6

13x = 18

x = 18 : 13

x = 1целая 5/13

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4) (16-x)/3 = (2x-1)/5 - 4  |*15

5(16-x) = 3(2x-1) - 4*15

80 - 5x = 6x - 3 - 60

80 - 5x = 6x - 63

6x + 5x = 80 + 63

11x = 143

x = 143 : 11

x = 13

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5) (x+17)/5 = (3x-7)/4 - 2   |*20

4(x+17) = 5(3x-7) - 2*20

4x + 68 = 15x - 35 - 40

4x + 68 = 15x - 75

15x - 4x = 75 + 68

11x = 143

x = 143 : 11

x = 13