find the value of x
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Step-by-step explanation:
x+10°+x+x+20°=180°
3x+30°=180°
3x=180°-30°
3x=150°
x=150°/3
x=50°
x+10°=(50+10)°=60°
x=50°
x+20°=(50+20)°=70°
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