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- 4*( - x + 7 ) = x + 17 
4x - 28 = x + 17 
3x = 45 
x = 15 

c - 32 = - 7 * ( c + 8 ) 
c - 32 = - 7c - 56
8c = - 24 
c = - 3 

3 * ( 4x - 8 ) = 3x - 6 
12x - 24 = 3x - 6 
9x = 18 
x = 2 

5 * ( x - 7 ) = 3 * ( x - 4 ) 
5x - 35 = 3x - 12 
2x = 23 
x = 11,5 

4 * ( x - 3 ) - 16 = 5 * ( x - 5 ) 
4x - 12 - 16 = 5x - 25 
4x - 28 = 5x - 25 
x = - 3 

8 * ( 2a - 6 ) = 2 * ( 4a + 3 ) 
16a - 48 = 8a + 6 
8a = 54 
a = 6,75 

- 4 * ( 3 - 5x ) = 18x - 7 
- 12 + 20x = 18x - 7 
2x = 5 
x = 2,5 

6a + ( 3a - 2 ) = 14 
6a + 3a - 2 = 14 
9a = 16 
a = 1 ( 7/9 )

8x - ( 7x - 142 ) = 51 
8x - 7x + 142 = 51 
x = - 91