# In the given figure, AB || CD, CD || EF and y : z = 3 : 7, then x = ?A. 108°B. 126°C. 162°D. 63°

Let n be the common multiple.

Y + Z = 180

3n + 7n = 180

N =18

So, y = 3n = 54o

z = 7n = 126o

x = z (Pair of alternate angles)

So, x = 126o

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