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natka813 [3]
3 years ago
6

What is the value of x?

Mathematics
2 answers:
Vinil7 [7]3 years ago
6 0

x=21

x-4 + 3x +100=180

x + 3x =84(180-100-4)

4x=84

x=21

x-4=17

3x21=63

100+21+63=180

Gnom [1K]3 years ago
4 0
X=21

since there are 180° in a triangle you just have to make sure its equal,so it would be :
(21-4)+(3 *21)=100°
17+63+100=180

there for x equals 21
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