if angle a + b = 180 and a- b = 80 .find a and b.
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a equal to 130 and b equal to 50
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a+b=180
a=180-b
a-b=80
180-b-b=80
100=2b
b=50
a=180-b
a-b=80
180-b-b=80
100=2b
b=50
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