Respuesta :

SINAZEUS
B is the correct answer


this triangle is a isosceles triangle. so angle R is equal to angle T.

and

U + T = 180


so the answer is :
[tex]5x - 30 + 5x = 180 \\ 5x + 5x = 180 + 30 \\ 10x = 210 \\ x = 21[/tex]



good luck

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