По горизонтали 5. (z-1,2):0,6 = 21,1. 6. (10,49-y):4,02 = 0,805. 8. 10-2,4x = 3,16. По вертикали 1. 8,2x-4,4x = 38,38. 2. 4,2y-y = 5,12. 3. 9x-8,67x = 0,6699. 4. (y+26,1)·2,3 = 70,84. 7. 3,5x+x = 9,9.

Решение:

По горизонтали:

1. 5. \( (z-1,2):0,6 = 21,1 \)
   \( z-1,2 = 21,1 \cdot 0,6 \)
   \( z-1,2 = 12,66 \)
   \( z = 12,66 + 1,2 \)
   \( z = 13,86 \)
2. 6. \( (10,49-y):4,02 = 0,805 \)
   \( 10,49-y = 0,805 \cdot 4,02 \)
   \( 10,49-y = 3,2361 \)
   \( y = 10,49 - 3,2361 \)
   \( y = 7,2539 \)
3. 8. \( 10-2,4x = 3,16 \)
   \( 2,4x = 10 - 3,16 \)
   \( 2,4x = 6,84 \)
   \( x = \frac{6,84}{2,4} \)
   \( x = 2,85 \)

По вертикали:

1. 1. \( 8,2x-4,4x = 38,38 \)
   \( 3,8x = 38,38 \)
   \( x = \frac{38,38}{3,8} \)
   \( x = 10,1 \)
2. 2. \( 4,2y-y = 5,12 \)
   \( 3,2y = 5,12 \)
   \( y = \frac{5,12}{3,2} \)
   \( y = 1,6 \)
3. 3. \( 9x-8,67x = 0,6699 \)
   \( 0,33x = 0,6699 \)
   \( x = \frac{0,6699}{0,33} \)
   \( x = 2,03 \)
4. 4. \( (y+26,1) \cdot 2,3 = 70,84 \)
   \( y+26,1 = \frac{70,84}{2,3} \)
   \( y+26,1 = 30,8 \)
   \( y = 30,8 - 26,1 \)
   \( y = 4,7 \)
5. 7. \( 3,5x+x = 9,9 \)
   \( 4,5x = 9,9 \)
   \( x = \frac{9,9}{4,5} \)
   \( x = 2,2 \)

Ответ:

• По горизонтали: 5. z = 13,86; 6. y = 7,2539; 8. x = 2,85.
• По вертикали: 1. x = 10,1; 2. y = 1,6; 3. x = 2,03; 4. y = 4,7; 7. x = 2,2.