The larger of two supplementary angles exceeds the smaller by 180, find them. (Ans:990,810)
Ans: x + y = 180^{0}
x - y = 18^{0}
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2x = 198
x = 198 / 2 = x = 99^{0}
x + y = 180^{0}
y = 180 - 99
y = 81^{0}