x axis is to the right and y axis is upward.
so F1 = 8i and F2 = - 6j
for static system, Fnet = F1 + F2 + F = 0
F = - 8i + 6j
magnitude = sqrt(8^2 + 6^2) = 10 N
direction = tan^-1(6/8) = 37 deg
So 10 N at 37 deg above from the left side.
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