Answer:
3g
Step-by-step explanation:
We know that
20g = 8g + 4 * r
where r is the weight of a single red circle.
12g = 4 * r
3g = r
hope it helps you see the attachment
4
27-6=21 1
21-6=15 2
15-6=9 3
9-6=3 4
x=0
a) x=2
at any point of the line x=2
