Question

solve it please
























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Answer 1

y+z =180( alternate interior angle)

=> 3a+7a= 180

=> 10a=180

=>a= 18

y= 3a= 54

then x = 180-y = 180-54= 126

Answer 2

Answer:

$3x + 7x = 180 \\ \\ = > 10x = 180 \\ \\ = > x = \frac{180}{10} = 18$

Hence x =18