Question

resolver y verificar las siguientes ecuaciones 3×(x+5)-6=5+5×(x+2)
8x-3×(2+5x)=2×(7-x)
13-19x+9+7x=x-4-13x​

Answer 1

Respuesta:

la ultima no c si esta bien copiada xq no m sale la comprobacion

Explicación paso a paso:

3 × ( x + 5 ) - 6 = 5 + 5 × ( x + 2 )

3x + 15 - 6 = 5 + 5x + 10

3x - 5x = 10 + 5 - 15 + 6

- 2x = 21 - 15

- x = 6 / 2

- x = 3(-1)

x = - 3

comprobacion

3(-3) + 15 - 6 = 5 + 5(-3) + 10

- 9 + 15 - 6 = 5 - 15 + 10

- 15 + 15 = 15 - 15

0 = 0

8x - 3 × ( 2 + 5x ) = 2 × ( 7 - x )

8x - 6 - 15x = 14 - 2x

8x - 15x + 2x = 14 + 6

10x - 15x = 20

- 5x = 20

- x = 20 / 5

- x = 4 (-1)

x = - 4

comprobacion

8(-4) - 6 - 15(-4) = 14 - 2(-4)

- 32 - 6 + 60 = 14 + 8

- 38 + 60 = 22

22 = 22

13 - 19x + 9 + 7x = x - 4 - 13x​

- 19x + 7x - x + 13x = - 4 - 9 - 13

- 20x + 20x = - 26

0x = - 26

x = - 26 / 0

x = 0

comprobacion

- 19(0) + 7(0) - 0 + 13(0) = - 4 - 9 - 13

0 + 0 - 0 + 0 = 26

- 0  = 26