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Răspunsuri la întrebare
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 = 4 + 32 x
17 x - 32 x = 4 + 26
- 15 x = 30
x = 30 : ( - 15 )
x = - 2