If a / b = C / D = E / F = 1 / 3, then the value of (2a-3c + 4e) / 2b-3d + 4f is___________ .

As you can see from the title, 3A = B 3C = D 3E = f is (2a-3c + 4e) / 6a-9c + 12e = (2a-3c + 4e) / 3 (2a-3c + 4e) = 1 / 3

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