Respuesta :

The answer is c * 1 = m / (2 - d)

2c - cd = m
2 * c - c * d = m
c * (2 - d) = m

Divide (2 - d) from both sides:
c * (2 - d) / (2 - d) = m / (2 - d)
c * 1 = m / (2 - d)
c = m / (2 - d)
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