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1.-x +28 +2x =13
2.18-12x - 3 =17-2x
3.3x + 8x =12
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4
4.2x - 5 =1
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3
5.-2 razy 5x =7 - 3x


Odpowiedź :

Odpowiedź:

1.

-x +28 +2x =13

x = 13 - 28 = -15

2.

18 - 12x - 3 = 17 - 2x

-12x + 2x = 17 - 15

-10x = 2        /:(-10)

x = -1/5

3.

3x + 8x =12

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4

11/4x = 3        /*4/11

x = 12/11 = 1 1/11

4.2x - 5 =1

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3

1,4x - 5/3 = 1/3

1,4x = 1/3 + 1 2/3

1,4x = 2        /:1,4

x = 2 : 14/10 = 2 : 7/5 = 2 * 5/7 = 10/7 = 1 3/7

5 * (-2) * 5x = 7 - 3x

-10 *5x = 7 - 3x

-50x + 3x = 7

-47x = 7        /:(-47)

x = -7/47

Szczegółowe wyjaśnienie: