Respuesta :

suman4720

Step-by-step explanation:

[tex]\huge\bold\purple{ 5 }[/tex]

[tex]\huge\bold\purple{ explanation }[/tex]

[tex]90(right \: angle) = (9x + 1) + (7x + 9) \\ 90 = 16x + 10 \\ 16x = 90 - 10 = 80 \\ x = 80 \div 16 \\ x = 5| [/tex]

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