Weighting
Algebra
Level
1
All of these scales are perfectly balanced.
What is the weight of one circle?
The answer is 3.
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1 solution
⎩ ⎨ ⎧ 5 ◯ + □ + ♡ = 1 8 ◯ + □ + ♡ = 6 . . . ( 1 ) . . . ( 2 ) ⟹ ( 1 ) − ( 2 ) : 4 ◯ = 1 2 ⟹ ◯ = 3