Respuesta :

1dal1a

Answer:

2

Step-by-step explanation:

Let "a number" = x

5 + 6x = 21 - 2x

Now we can solve the linear equation:

5 + 6x = 21 - 2x

+2x        +2x

5 + 8x = 21

-5           -5

8x = 16

÷8    ÷8

x = 2

Hence, the answer is 2.

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