Answer:
320 i think 
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
I can not answer this question because vital information is missing.
Step-by-step explanation:
Pleas add a picture. At this moment I can not answer this question because vital information is missing. 
 
        
             
        
        
        
1. Area of triangle
1/2(10)(12)=60
There are two triangles, so multiply by 2
=120
2. Find area of the rectangles
This is an isosceles triangle, so the two rectangles are congruent
(2)(13)(3)=78
3. Find area of bottom rectangle
10(3)= 30
4. Add everything up
120+ 78 + 30= 228
Therefore the surface area of this prism is 228
I hope i helped :)
        
             
        
        
        
6x-8=8x-10 then 2=2x which means x=1