Question

Ecuaciones 2 5to grado.

Answer 1

Respuesta:

1. 17x - 16x = 12

x = 12

2. 7x + 8 +9x =56

7x + 9x = 56 - 8

16x = 48

x = 48/16

x = 3

3. 9x - 20 = 5x + 4

9x - 5x = 4 + 20

4x = 24

x = 24/4

x = 6

4. 6x + 10 = 2x + 18

6x - 2x = 18 - 10

4x = 8

x = 8/4

x = 2

5. 8x - 2 = 30 - 8x

8x + 8x = 30 + 2

16x = 32

x = 32/16

x = 2

6. 4x - 10 = 3x + 1 + 15 - 16

4x - 3x = 1 + 15 - 16 + 10

x = 10

7. 20x - 11 - 13x = 6x + 10

20x - 13x - 6x = 10 + 11

20x - 19x = 21

x = 21

8. 3(3x + 1) = 7x + 9

9x + 3 = 7x + 9

9x - 7x = 9 - 3

2x = 6

x = 6/2

x = 3

9. 4(2x - 3) = 5x

8x - 12 = 5x

8x - 5x = 12

3x = 12

x = 12/3

x = 4

10. 5(x + 7) = 45

5x + 35 = 45

5x = 45 - 35

5x = 10

x = 10/5

x = 2