Respuesta :

Answer:

b = (-4/5)a - (3/10)c

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-2(8a + 10b) = 6c

8a + 10b = -3c

10b = -8a - 3c

b = (-8/10)a - (3/10)c

b = (-4/5)a - (3/10)c

The answer above is correct my dude,