Question

resuelve los siguietes ejercicios de ecuaciones de primer grado y obten su comprobacion. 2(3x-2)=2. 4x+5=17. 2x1=5x+8. 2x+6-2=3x+14. 2x+5(×+1)=25. 2×+5=5×-20. 3(2×+1)=-9. 2(2×-5)=3(×1)-4. 5t+5=3t+7. 3t+4 (+-10)=t+20.... Pliss es para hoy​

Answer 1

Respuesta:

1.- 2 ( 3x - 2 ) = 2

6x - 4 = 2

6x = 4 + 2

x = 1

2.- 4x + 5 = 17

4x = 17 - 5

4x = 12

x = 3

3.- 2x1 = 5x + 8

2x = 5x + 8

- 3x = 8

- x = 8/3

x = -8/3

4.- 2x + 6 - 2 = 3x + 14

2x + 4 = 3x + 14

2x = 3x + 10

2x - 3x = 10

- x = 10

x = - 10

5.- 2x + 5 ( × + 1 ) = 25

2x + 5x + 5 = 25

7x = 20

x = 20/7

6.- 2× + 5 = 5× - 20

2× = 5× - 20 - 5

2× = 5× - 25

- 3x = -25

x = 25/3

7.- 3 ( 2× + 1 ) = - 9

6× + 3 = - 9

6x = - 12

x = - 2

8.- 2 ( 2× - 5 ) = 3 ( ×1 ) - 4

4× - 10 = 3x - 4

x = 6

9.- 5t + 5 = 3t + 7

5t = 3t + 7 - 5

5t - 3t = 2

2t = 2

t = 1

10.- 3t + 4 ( +- 10) = t + 20

3t - 40 = t + 20   o    3t + 40 = t + 20

2t - 40 = 20             2t = 20 - 40

t = 30                         t = 10