The angles of a triangle are (x-40)ᵒ , (x-20)ᵒ , ( 1/2x-10)ᵒ . Find the value of x.
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we know angle sum of triangle =180
x - 40 + x - 20 + 1/2x - 10 = 180
2x + 1/2x = 250
5/2x = 250
x = 100
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