balanced and unbalanced forces

The net force is 5 which makes the forces unbalanced. 4+4=8-3=5
When the forces are going opposite ways, we subtract them, then if the total is 0 its balanced.
The person that is down weighs more, so the net force will not be 0.
Each of the blocks weigh the same, so the net force will be 0, which means its balanced.
The unknown object that is in the red bucket has more newtons than the object in the blue bucket, so its unbalanced.
The unknown amount is even, because the scale is balanced.

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