Answer:
x= 33
Step-by-step explanation:
Basically, all triangles add up to 180 degrees, so you add all of the angles together and make it equal to 180 as such
x + (2x-3) + (3x-15) = 180 deg, then add like terms
6x-18=180, then add 18 to both sides to get rid of the one on left
6x=198, then simplify
x=33
You can check it by substituting 33 for all of the x's and seeing if it adds to 180
You get bottom left=33 , top = 63 , bottom right = 84 which all add to 180
