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DENIUS [597]
3 years ago
6

Need some help? Image should convey the rest.

Mathematics
1 answer:
KonstantinChe [14]3 years ago
7 0

Answer:

30+(4x-4)=180-90(angle sum of triangle)

30+4x-4=90

4x+30-4=90

4x+26=90

4x=90-26

=54

x=54÷4

=13.5

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