Please help me to solve this question.
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Answer:
angle B is 40 degree and angle a is 140 degree
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Answer:
a - 3b = 20
=》a = 20+3b................ (1)
again a+ b= 180 (linear pair)
20+ 3b + b = 180
=》4b = 160
=》b = 40
putting the value of b in (1)
a = 20+ 3 × 40
=20+120
=140
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