3x+15+6x-10+8x+5=180°
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3x+15+6x-10+8x+5=180°
3x+6x+8x+15+5-10=180°
17x+10=180°
17x=180°-10
17x=170
x=170/17
x=10
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Answered by
1
Answer:
=3x+6x+8x+15-10+5
=17x+10
17x+10=180
17x=180-10
x=170/17
x=10
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