please...help me with this question...
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x°+(x+10)°+90° = 180° [TheEquation]
=> x°+x°+10°+90° = 180°
=> 2x°+100 = 180°
=> 2x° = 180°-100°
=> 2x° = 80°
=> x° = 80°/2
=> x° = 40°
Hope it helps...
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