Question

ajutor. Imi trebuie pt maine va rog mult.
Dau coroana+multe pct va rog mult

Answer 1

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Answer 2

a)  

3 [ 2 ( x + 4 ) - 3 ( x - 5 ) ] = 4 [ 3 ( x + 2 ) - 4 ( x + 1 ) ] + 15

3 ( 2 x + 8 - 3 x + 15 ) = 4 ( 3 x + 6 - 4 x - 4 ) + 15

3 ( 23 - x ) = 4 ( 2 - x ) + 15

69 - 3 x = 8 - 4 x + 15

- 3 x + 4 x = 23 - 69

x = - 46

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b)

3 [ 8 - 5 ( 3 x - 2 ) ] + 4 ( 4 x - 9 ) = 2 [ 3 ( 2 x - 5 ) + 28 ] - 49

3 ( 8 - 15 x+ 10 ) + 16 x - 36 = 2 ( 6 x - 15 + 28 ) - 49

3 ( 18 - 15 x )  + 16 x - 36 = 2 ( 6 x + 13 ) - 49

54 - 45 x + 16 x - 36 = 12 x + 26 - 49

18 - 29 x = 12 x - 23

- 29 x - 12 x = - 23 - 18

- 41 x = - 41

x = ( - 41 ) : ( - 41 )

x = 1

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c)

2 [ 7 ( 2 x - 1 ) - 3 ( 4 x - 1 ) ] = 3 [ 5 ( 3 x + 2 ) - 1 ] - ( 19 x + 13 )

2 ( 14 x - 7 - 12 x + 3 ) = 3 ( 15 x + 10  - 1 ) - 19 x - 13

2 ( 2 x - 4 ) = 3 ( 15 x + 9 ) - 19 x - 13

4 x - 8 = 45 x + 27 - 19 x - 13

4 x - 26 x = 14 + 8

- 22 x = 22

x = 22 : ( - 22 )

x = - 1

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d)

3 [ 11 ( x + 2 ) - 2 ( 2 - 5 x ) ] = 2 [ 8 ( 3 + 4 x ) + 5 ] - ( 6 x + 11 )

3 ( 11 x + 22 - 4 + 10 x ) = 2 ( 24 + 32 x + 5 ) - 6 x - 11

3 ( 21 x + 18 ) = 2 ( 32 x + 29 ) - 6 x - 11

63 x + 54 = 64 x + 58 - 6 x - 11

63 x - 58 x = 47 - 54

5 x = - 7

x = - 7 / 5 = - 1,4