Answer:
x=65
Explanation:
since this is an isosceles triangle the bottom 2 angles each equal 25 degrees
the big triangle = 180 y is the other angle in the big triangle
25+25 + y = 180
50 + y = 180
subtract 50 from each side
y =180-50
y= 30
now y is split into 2 equal angles x
y = 2x
130 = 2x
divide each side by 2
130/2 =2x/2
65 = x