13) 4(x-8)=-5; 14) 10(x-9)=7; 15) 5(x+9)=-8; 16) 4(x+1)=9; 17) 10(x+2)=-7; 18) 5(x-6)=2.

Решение:

1. \( 4(x-8) = -5 \)
   \( 4x - 32 = -5 \)
   \( 4x = -5 + 32 \)
   \( 4x = 27 \)
   \( x = \frac{27}{4} \)
2. \( 10(x-9) = 7 \)
   \( 10x - 90 = 7 \)
   \( 10x = 7 + 90 \)
   \( 10x = 97 \)
   \( x = \frac{97}{10} \)
3. \( 5(x+9) = -8 \)
   \( 5x + 45 = -8 \)
   \( 5x = -8 - 45 \)
   \( 5x = -53 \)
   \( x = -\frac{53}{5} \)
4. \( 4(x+1) = 9 \)
   \( 4x + 4 = 9 \)
   \( 4x = 9 - 4 \)
   \( 4x = 5 \)
   \( x = \frac{5}{4} \)
5. \( 10(x+2) = -7 \)
   \( 10x + 20 = -7 \)
   \( 10x = -7 - 20 \)
   \( 10x = -27 \)
   \( x = -\frac{27}{10} \)
6. \( 5(x-6) = 2 \)
   \( 5x - 30 = 2 \)
   \( 5x = 2 + 30 \)
   \( 5x = 32 \)
   \( x = \frac{32}{5} \)

Ответ: 13) \( x = \frac{27}{4} \); 14) \( x = \frac{97}{10} \); 15) \( x = -\frac{53}{5} \); 16) \( x = \frac{5}{4} \); 17) \( x = -\frac{27}{10} \); 18) \( x = \frac{32}{5} \).