Answer:
x = 25
Explanation:
the 2 legs of the Δ are congruent (equal ) , as indicated by the dashes through them.
thus the triangle is isosceles with base angles congruent , then
base angles = 2x
the sum of the 3 angles in a triangle = 180°
sum the 3 angles, equate to 180 and solve for x
2x + 2x + 3x + 5 = 180 ( simplify left side )
7 x + 5 = 180 ( subtract 5 from both sides )
7x = 175 ( divide both sides by 7 )
x = 25