free body diagrams

Question

The net force on a brick is 45 N [L]. There are 3 forces acting on the brick. Determine the value of F₁ based on the following information. A free-body diagram may help.

F1 = ?

F2 = 85 N [L]

F3 = 27 N [R]

a)13N(R)

b)103N(L)

c) 103N(R)

d)58N(L)

pls answer asap thanks

Answer 1

Let R be + and L be - F1+F2+F3 = FNet

F1 + (-85) + 27 = -45

Solve for F1