akirahmyers60 akirahmyers60

23-09-2021
Mathematics

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discipulus discipulus

23-09-2021

Answer:

[tex]4x + 5x + {9}^{ \degree} = {90}^{\degree} \\ 9x = {81}^{ \degree} \\ x = \frac{ {81}^{ \degree}}{9} \\ \therefore \: x = {9}^{ \degree}[/tex]

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