Question

whats the weight of 4 circles?

Explanation:

Step1: Set up equation

Let the weight of one circle be $c$. The total weight on the scale is the weight of 4 circles plus the weight of the 3 - unit weight. So we have the equation $4c + 3=11$.

Step2: Isolate 4c

Subtract 3 from both sides of the equation. $4c+3 - 3=11 - 3$. This simplifies to $4c=8$.

Answer:

8