Respuesta :

Answer:

x=13

Step-by-step explanation:

Once again, all three angles of a triangle add up to 180° so we can form the equation: 47+90(this is the right angle)+4x-9=180°

Algebra:

47+90+4x-9=180

128+4x=180

4x=52

x=13

Hope this helps!! :) And that's all the time I have!! :( You can do it!! Good luck with the rest of your homework! :D