Question

if angle BOC =(7 x + 20 )degree, angle COA =3 X and angle AOB is a straight line, then x = ?
[HINT :angle BOC and angle COA form a linear pair]​

Answer 1

From the figure and hint

we know that angle BOC nadir angle AOC are in the linear pair

so that angle sum is = 180°

so ,

angle AOC + angle BOC = 180°

(3X)° + (7X + 20)° = 180°

3X + 7X + 20 = 180

10X + 20 = 180

10X = 180 - 20

10X = 160

X = 16

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Answer 2

16°

Step-by-step explanation:

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