Respuesta :

The answer is 125. Hope it helps you
DeanR
I hate these stupid algebra problems pretending to be geometry.

The geometry fact we need is the sum of the angles of a triangle is 180 degrees.  We write:

x + 30 + 25 = 180

x = 180 - 30 - 25 = 125

Check: 125 + 25 + 30  = 180    good