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Matematyka rownania

-5x-7 =-16x -29

4(x-1)= 2(x+15)

-2(2x+5) =5(x -11)


Odpowiedź :

- 5 x - 7 = - 16 x - 29

- 5 x + 16 x = - 29 + 7

11 x = - 22 / : 11

x = - 2



4 ( x - 1 ) = 2 ( x + 15 )

4 x - 4 = 2x + 30

4 x - 2 x = 30 + 4

2 x = 34 / : 2

x = 17



- 2 ( 2 x + 5 ) = 5 ( x - 11 )

- 4 x - 10 = 5x - 55

- 4x - 5 x = - 55 + 10

- 9 x = - 45 / : ( - 9 )

x = 5

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