solve this maths question
and please clearly explain how x + x + x/2 = 2x + 2x + x/2
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The sum of measures of angles of a triangles is 180 degrees
∴(x−40)+(x−20)+(x/2−10)=180
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∴5x/2−70
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=180
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∴5x/2=250
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∴5x=500
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∴x=100
o
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