Respuesta :

DarkUnix
1)

=> m∠2 = 2x +13
=> m∠1 =  4x - 1
Since YP angle bisector the angles with be equal to each other,

m∠1 = m∠2
2x + 13 = 4x - 1
2x - 4x = -1 -13
-2x = -14
x = 7

All other questions are to be done in that way, don't be lazy :P

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