Sum of X-components

Sum of X-components = F3 + FX + Fy  
Sum of X-components = (-12.5n) + (4.9n) + (6.3n)
Sum of X-components = -1.3n

Sum of Y-components

Sum of Y-components = F1y + F2y  
Sum of Y-components = (6.3n) + (-6.1n)
Sum of Y-components = 0.20n