If a-2b=30 find a and b
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Given : ∠AOC and ∠BOC form a linear pair. => a + b = 180° …..(1) a – 2b = 30° …(2) On subtracting equation (2) from (1), we get a + b – a + 2b = 180° – 30° 3b = 150° b = 150/3 b = 50° Since, a – 2b = 30° a – 2(50) = 30° a = 30° + 100° a = 130° Therefore, the values of a and b are 130° and 50° respectivelyRead more on Sarthaks.com - https://www.sarthaks.com/608351/in-figure-aoc-and-boc-form-a-linear-pair-if-a-2b-30-find-a-and-b
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a-2b=30
a=30+2b.....(1)
and a+b=180 because of straight line
a+b=180
30+2b+b=180
30+3b=180
3b=180-30
3b=150
b=50....(2)
put eq(2) in eq(1)
a=30+2b
a=30+2×50
a=30+100
a=130
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