In the picture you will see a weighing or balancing scale with weights on both ends.
Find the value of the missing weight in the given image.
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We can solve this as follows;
M¹ x d¹ = m² x d²
(9 + 3 + m) x 4 = 12 × 6
(12 + m) x 4 = 72
48 + 4m = 72
4m = 72 – 48
4m = 24
m = 24/4
m = 6
Missing weight = 6 kg = Answer.
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3kg