Question

Resolva as seguintes equações (com contas)

1. X-3 = 7

2. X+4 = 10

3. X+101 = 300

4. X-279 = 237

5. X-8 = 10

6. X+9 = -1

7. 3x = 12

8. 9x = 18

9. 35x = -105

10. 7x -1 = 13

11. 6x - 10 = 2x + 14

12. 6x = 2x + 28

13. 3 (x+2) = 15

14. 2 (x-1) -7 = 16

15. 7 (x-2) = 5 (x+3)

Answer 1

Resposta:

1. x=10

2. x=6

3. x=199

4. x=516

5. x=18

6. x= -10

7. x=4

8. x=2

9. x= -3

10. x=2

11. x=6

12. x=7

13. x=3

14. x=25/2

15. x=29/2

Explicação passo-a-passo:

1. X-3 = 7

x=7+3=10

2. X+4 = 10

x=10-4=6

3. X+101 = 300

x=300-101=199

4. X-279 = 237

x=237+279=516

5. X-8 = 10

x=10+8=18

6. X+9 = -1

x=-1-9= -10

7. 3x = 12

x=12/3=4

8. 9x = 18

x=18/9=2

9. 35x = -105

x= - 105/35 = -3

10. 7x -1 = 13

7x=13+1

7x=14

x=14/7=2

11. 6x - 10 = 2x + 14

6x-2x=14+10

4x=24

x=24/4=6

12. 6x = 2x + 28

6x-2x=28

4x=28

x=7

13. 3 (x+2) = 15

3x+6=15

3x=15-6

3x=9

x=3

14. 2 (x-1) -7 = 16

2x-2-7=16

2x-9=16

2x=16+9

2x=25

x=25/2

15. 7 (x-2) = 5 (x+3)

7x-14=5x+15

7x-5x=15+14

2x=29

x=29/2