Answer:
x = 20
Explanation:
Vertically opposite are equal
therefore
6x + 20 = 140
6x = 140-20
6x = 120
6x/6 = 120/6
Answer is 20
When two lines intersect each other as a result of that, every opposite angles are equal
so,
6x+20 = 140
x = 120/6
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