Question

SON ECUACIONES DE PRIMER GRADO
cuanto es...
5x-12=3
3x+1=X-3
5t+5=3t+7
Se los agradecería ​

Answer 1

Respuesta:

1) X = 3

2) X = -2

3) T = 1

Explicación paso a paso:

1) 5x - 12 = 3

5x = 3 + 12

5x = 15

x = 15/5

x = 3

2) 3x + 1 = x - 3

3x - x = -3 -1

2x = -4

x = -4/2

x = -2

3) 5t + 5 = 3t + 7

5t - 3t = 7 - 5

2t = 2

t = 2/2

t = 1

Answer 2

Hola! :3

Resolvemos las ecuaciones:

5x - 12 = 3

5x = 3 + 12

5x = 15

x = 15/5

x = 3

Comprobamos:

5(3) - 12 = 3

15 - 12 = 3

3 = 3

3x + 1 = x - 3

3x - x = -3 - 1

2x = -4

x = -4/2

x = -2

Comprobamos:

3(-2) + 1 = (-2) - 3

-6 + 1 = -2 - 3

-5 = -5

5t + 5 = 3t + 7

5t - 3t = 7 - 5

2t = 2

t = 2/2

t = 1

Comprobamos:

5(1) + 5 = 3(1) + 7

5 + 5 = 3 + 7

10 = 10

Espero haberte ayudado :D

Atte: Jean07122006