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2 + x = 10
- 3x = 15
1/2x = 4
2/5x = 2
7x - 3 = 60
2x + 8 = 28
3x + 5 = 0,2
2x - 4x - 5 = 7
x + 3x - 2 = 10
1/2x + 1 - x = - 4

Odpowiedź :

Mushriimgo
2+x = 10
x = 8

-3x = 15
x = -5

1/2x = 4
x = 8

2/5x = 2
x = 5

7x -3 = 60
7x = 63
x = 9

2x + 8 = 28
2x = 20
x = 10

3x + 5 = 0,2
3x = 4,8
x = 1,6

2x - 4x - 5 = 7
-2x = 12
x = -6

x + 3x - 2 = 10
4x = 12
x = 3

1/2x + 1 - x = -4
-1/2x = -5
x = 10

Odpowiedź:

a) 2+x=10  

x = 10-2

x = 8

b) -3x=15   /:(-3)

x = -5    

c) 1/2x = 4   /:(1/2)

x = 8

d) 2/5x = 2    /:(2/5)

x = 5

e) 7x - 3 = 60

7x = 60+3

7x = 63  /:7

x = 9

f) 2x+8= 28

2x = 28-8

2x=20    /:2

x = 10

g) 3x+5=0,2

3x=0,2-5

3x = -4,8   / :3

x = -1,6

h) 2x-4x-5=7

-2x-5=7

-2x = 7+5

-2x = 12  /(-2)

x = -6

i) x+3x-2 = 10

4x-2=10

4x=12  /:4

x=3

j) 1/2x+1-x=-4

-1/2x+1 = -4

-1/2x = -5  /:(-1/2)

x = 10

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