How Do You Find Support Reactions in Structural Analysis?

[chetzread]

Homework Statement

I'm having problem of finding the support reactions of Va , Vb and Vc

Homework Equations

The Attempt at a Solution

My working is VA +VB +VC = 10+5(3)

VA +VB +VC = 25
But , when i sub in the value of VA , VB and VC , it doesn't satisfy the equation of VA +VB +VC = 10+5(3) , why I'm wrong ? [/B]

 

[Simon Bridge]

Please explain your reasoning.

 

[chetzread]

Please explain your reasoning.

VA, vb and vc act upwards, while 10+5(3) act downward, upwards forces = downward forces