Respuesta :

wegnerkolmp2741o

Answer:

x=5

Step-by-step explanation:

The angles of a triangle add up to 180 degrees

91 +     10x-4 +   8x+3  = 180

Combine like terms

18x +90 = 180

Subtract 90 from each side

18x +90-90= 180-90

18x = 90

Divide each side by 18

18x/18 = 90/18

x = 5

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