Respuesta :

MathPhys

Step-by-step explanation:

The triangle is isosceles, so the base angles are the same.

All three angles add up to 180°.

(6x + 4) + (6x + 4) + (18x − 8) = 180

30x = 180

x = 6

Answer:x=6

Step-by-step explanation:since those two sides shown are the same length, the missing angle is also 6x+4. the angles on a triangle always will equal 180. so you set the problem up as 6x+4+6x+4+18x-8=180. when you combine like terms it is then 30x=180. x=6