Guzier00236
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poziom A
a) 4 * x - 3+5 * x = 15
b) 5x + 7 - 3 * x = 13
c) 7 * x-2-6 * x = 5
d) 6 * x - 4 + 4 * x = 56
poziom B
a) 6 * X = 2 - x - 8
b) 8 * x = 9+ 5 * x
c) 7* x = 2 * x - 20
d) 2 * x = 12 - 2 * x
poziom C
a) 8 - 3 * x = 6 * X-10
b) 7 * x - 4 = 9 + 8 * x
c) -5 + 7.x = 2.x - 20
d) 8 - 2 * x = - 4+2 * C

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Odpowiedź :

Hejka!

Poziom A :

4 • x - 3 + 5 • x = 15

4x - 3 + 5x = 15

4x + 5x = 15 + 3

9x = 18 / : 9

x = 2

5x + 7 - 3 • x = 13

5x - 3x = 13 - 7

2x = 6 / : 2

x = 3

7 • x - 2 - 6 • x = 5

7x - 6x = 5 + 2

x = 7

6 • x - 4 + 4 • x = 56

6x + 4x = 56 + 4

10x = 60 / : 10

x = 6

Poziom B :

6 • x = 2 - x - 8

6x + x = 2 - 8

7x = -6 / : 7

x = -6/7

8 • x = 9 + 5 • x

8x - 5x = 9

3x = 9 / : 3

x = 3

7 • x = 2 • x - 20

7x - 2x = -20

5x = -20 / : 5

x = -4

2 • x = 12 - 2 • x

2x + 2x = 12

4x = 12 / : 4

x = 3

Poziom C :

8 - 3 • x = 6 • x - 10

-3x - 6x = -10 - 8

-9x = -18 / : (-9)

x = 2

7 • x - 4 = 9 + 8 • x

7x - 8x = 9 + 4

-x = 13 / : (-1)

x = -13

-5 + 7 • x = 2x - 20

7x - 2x = -20 + 5

5x = -15 / : 5

x = -3

8 - 2 • x = -4 + 2 • x

-2x - 2x = -4 - 8

-4x = -12 / : (-4)

x = 3

Pozdrawiam! - Julka

Zosialiu10

A

4 • x - 3 + 5 • x = 15

4x - 3 + 5x = 15

4x + 5x = 15 + 3

9x = 18 / : 9

x = 2

5x + 7 - 3 • x = 13

5x - 3x = 13 - 7

2x = 6 / : 2

x = 3

7 • x - 2 - 6 • x = 5

7x - 6x = 5 + 2

x = 7

6 • x - 4 + 4 • x = 56

6x + 4x = 56 + 4

10x = 60 / : 10

x = 6

B

6 • x = 2 - x - 8

6x + x = 2 - 8

7x = -6 / : 7

x = -6/7

8 • x = 9 + 5 • x

8x - 5x = 9

3x = 9 / : 3

x = 3

7 • x = 2 • x - 20

7x - 2x = -20

5x = -20 / : 5

x = -4

2 • x = 12 - 2 • x

2x + 2x = 12

4x = 12 / : 4

x = 3

C

8 - 3 • x = 6 • x - 10

-3x - 6x = -10 - 8

-9x = -18 / : (-9)

x = 2

7 • x - 4 = 9 + 8 • x

7x - 8x = 9 + 4

- x = 13 / : (-1)

x = -13

-5 + 7 • x = 2x - 20

7x - 2x = -20 + 5

5x = -15 / : 5

x = -3

8 - 2 • x = -4 + 2 • x

-2x - 2x = -4 - 8

-4x = -12 / : (-4)

x = 3

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