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## Homework Statement

Hi. Question 1-5 from http://www.slideshare.net/hotman1991/met-302-chapter-01 has me puzzled. In the support reactions in F

_{y}, they state B

_{y}+ 3.00 - 9.00 = 0. I do not understand why the 3 is positive.

## Homework Equations

## The Attempt at a Solution

When doing it myself, I took point A as the Pivot point. So I have negative 9 kip (from that 0 to 1.5 kip triangle), B

_{y}, and *negative* 3 kip from the force right beside E. Is there something wrong with my logic?