Question

Angle 'a' and 'b' form a linear pair of angles and a-2b=30degree. Find the value of a

Answer 1

a=130
b=50
are the right answer

Answer 2

a+b=180 (linear pair) (first equation)
a-2b=30 (second equation)
now subtract second equation from first equation
            a+b=180
        -   a-2b=30
        =  3b=150
b=50
a+b=180
a+50=180
a=130 
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