dertron486 dertron486

26-08-2021
Mathematics

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Melody08 Melody08

26-08-2021

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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