Question

Resuelvo las siguientes ecuaciones y luego veeifico ayuda porfa es para hoy​

Answer 1

Hola! :3

Resolvemos:

1)

3x+1 = x-1

3x-x = -1-1

2x = -2

x = -2/2

x = -1

Comprobamos:

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

-3+1 = -1-1

-2 = -2

2)

9x-8 = 4x+12

9x-4x = 12+8

5x = 20

x = 20/5

x = 4

Comprobamos:

9(4)-8 = 4(4)+12

36-8 = 16+12

28 = 28

3)

40-2x = 7x-5

40+5 = 7x+2x

45 = 9x

45/9 = x

5 = x

Comprobamos:

40-2(5) = 7(5)-5

40-10 = 35-5

30 = 30

4)

7x-4-9x+6 = 10x-6x+8

-2x+2 = 4x+8

2-8 = 4x+2x

-6 = 6x

-6/6 = x

-1 = x

Comprobamos:

7(-1)-4-9(-1)+6 = 10(-1)-6(-1)+8

-7-4+9+6 = -10+6+8

-11+15 = -4+8

4 = 4

Espero haberte ayudado :D