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kenny6666 [7]
3 years ago
10

Please help me do this

Mathematics
1 answer:
ra1l [238]3 years ago
4 0
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
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Read 2 more answers
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