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Two adjacent angles forming a linear pair are $(x + 20)$ ° and $(2 x - 50)$ °. Find $x$ .

Class 7Adjacent and Vertically Opposite AnglesLines and Angles

A77
B70
C140
D63

Step-by-Step Solution

Linear pair sums to 180:

(x + 20) + (2 x - 50) = 180, 3 x - 30 = 180, 3 x = 210, x = 70

.

Answer: B) 70

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