Respuesta :

Answer:

[tex]a = \frac{1}{2} (b + c) \\ 2a = b + c \\ \boxed{b = 2a - c}[/tex]

Answer:

b = 2a - c

Step-by-step explanation:

a=1/2(b+c)

2a = b+c

2a-c = b

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