Respuesta :

We can pose this question in the following way:

The value for x and BC are:

[tex]2x+4x=12\Rightarrow6x=12\Rightarrow\frac{6}{6}\cdot x=\frac{12}{6}\Rightarrow x=2[/tex]

Then, x = 2. And BC is :

[tex]BC=2\cdot x=2\cdot2\Rightarrow BC=4[/tex]

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