Question

va rog dau coroana+multe puncte

Answer 1

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Answer 2

a)

6 ( x + 3 ) - 7 ( x + 5 ) = 4 ( x + 1 ) - 2 ( x + 6 ) + 12

6 x + 18 - 7 x - 35 = 4 x + 4 - 2 x - 12 + 12

- x - 17 = 2 x + 4

- x - 2 x = 4 + 17

- 3 x = 21

x = 21 : ( - 3 )

x = - 7

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b)

5 ( 2 x + 7 ) - 3 ( 3 x - 8 ) = 9 x - 2 ( 3 x - 5 ) + 13

10 x + 35 - 9 x + 24 = 9 x - 6 x + 10 + 13

x + 59 = 3 x + 23

x - 3 x = 23 - 59

- 2 x = - 36

x = ( - 36 ) : ( - 2 )

x = 18

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c)

3 ( 4 x - 11 ) + 5 ( 7 - 2 x ) = 16 - 3 ( 3 x - 10 )

12 x - 33 + 35 - 10 x = 16 - 9 x + 30

2 x + 2 = 46 - 9 x

2 x + 9 x = 46 - 2

11 x = 44

x = 44 : 11

x = 4

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d)

7 ( 5 x - 8 ) + 6 ( 5 - 3 x ) = 28 - 8 ( 3 - 4 x )

35 x - 56 + 30 - 18 x = 28 - 24 + 32 x

17 x - 26 = 32 x + 4

17 x - 32 x = 4 + 26

- 15 x = 30

x = 30 : ( - 15 )

x = - 2