Question

6 – x = 4(x – 3) – 7(x – 4)

Answer 1

Respuesta:

6 – x = 4(x – 3) – 7(x – 4)

6 - x =  4x - 12 - 7x + 28

-x - 4x + 7x = -12 + 28 - 6

-5x + 7x = -18 + 28

2x = 10

x = 5

Comprobación :

sustituimos las "X" por 5

6 – x = 4(x – 3) – 7(x – 4)

6 - 5 = 4(5 - 3) - 7(5 - 4)

1 = 4(2) - 7(1)

1 = 8 - 7

1 = 1