Question

1) (x + 3). 2 = 18 2) (x – 7) · 4 = 64 3) (x - 9:2= 25 4) (x + 5): 7 = 8 5) (x + 11) : 6 = 84 6) (x – 15): 3 = 11 7) (2x +5).6 = 78 8) (3x – 10) · 4 = 20 9) (2x – 9): 5 = 3 10) (7x + 3) : 6 = 4 11)(10x – 27). 5 = 15 12)(8x + 3) : 7 = 5 Найти х

Answer 1

Ответ:

1)х+3=18÷2

х+3=9

х=6

2)х-7= 64÷4

x-7=16

x=23

3)x-9=25×2

x-9=50

x=50-9

x=41

4)x+5=8×7

x+5=56

x=51

5)x+11=84×6

x+11=504

x=493

6)x-15=11×3

x-15=33

x=18

7)2x+5=78×6

2x+5=468

2x=463

x=231,5

8)3x-10=20×4

3x-10=80

3x=90

x=30

9)2x-9=5×3

2x-9=15

2x=24

x=12

10)7x+3=24

7x=21

x=3

11)10x-27=75

10x=102

x=10,2

12)8x+3=35

8x=32

x=4

Answer 2

To find the value of x in each equation, we can solve them one by one. Here's the solution for each equation:

1. (x + 3) * 2 = 18 Distribute the 2: 2x + 6 = 18 Subtract 6 from both sides: 2x = 12 Divide both sides by 2: x = 6

2. (x - 7) * 4 = 64 Distribute the 4: 4x - 28 = 64 Add 28 to both sides: 4x = 92 Divide both sides by 4: x = 23

3. (x - 9) / 2 = 25 Multiply both sides by 2: x - 9 = 50 Add 9 to both sides: x = 59

4. (x + 5) / 7 = 8 Multiply both sides by 7: x + 5 = 56 Subtract 5 from both sides: x = 51

5. (x + 11) / 6 = 84 Multiply both sides by 6: x + 11 = 504 Subtract 11 from both sides: x = 493

6. (x - 15) / 3 = 11 Multiply both sides by 3: x - 15 = 33 Add 15 to both sides: x = 48

7. (2x + 5) * 6 = 78 Distribute the 6: 12x + 30 = 78 Subtract 30 from both sides: 12x = 48 Divide both sides by 12: x = 4

8. (3x - 10) * 4 = 20 Distribute the 4: 12x - 40 = 20 Add 40 to both sides: 12x = 60 Divide both sides by 12: x = 5

9. (2x - 9) / 5 = 3 Multiply both sides by 5: 2x - 9 = 15 Add 9 to both sides: 2x = 24 Divide both sides by 2: x = 12

10. (7x + 3) / 6 = 4 Multiply both sides by 6: 7x + 3 = 24 Subtract 3 from both sides: 7x = 21 Divide both sides by 7: x = 3

11. (10x - 27) * 5 = 15 Distribute the 5: 50x - 135 = 15 Add 135 to both sides: 50x = 150 Divide both sides by 50: x = 3

12. (8x + 3) / 7 = 5 Multiply both sides by 7: 8x + 3 = 35 Subtract 3 from both sides: 8x = 32 Divide both sides by 8: x = 4

So, the solutions for each equation are:

1. x = 6
2. x = 23
3. x = 59
4. x = 51
5. x = 493
6. x = 48
7. x = 4
8. x = 5
9. x = 12
10. x = 3
11. x = 3
12. x = 4