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nonuniform distributed loads question

Hello,

Attached are questions I am having trouble coming up with the point loads. My book does not explain it well enough, to let me figure it out.

Can someone help me with the formula to solve these. I have tried a few things and nothing is coming close to the answers.

The problems I am inquiring about is.

55, 60 61.

I can figure out distributed loads, but when they are non uniform, Again my books does not explain it well enough.

If someone can help me with this, it would be greatly appreciated, thanks.

Joanne(Rofl)