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Please help me do this
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13 votes
Please help me do this

Please help me do this-example-1
User Jamesxiang
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1 Answer

11 votes
Sum of angles in a triangle is equal to 180
So you add the angle such that
13x+2+5x-7+3x-4=180
21x-9=180
21x=189
X=189/21
X=9
User Fphelp
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