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Each bag $x$ weighs the same and the numbered weights are in kg. The pans balance. What is $x$ ?

Class 7Checking Solutions by TrialSimple Equations

A8 kg
B6 kg
C12 kg
D4 kg

Step-by-Step Solution

3 x + 4 = x + 20

. Take one bag off each side:

2 x + 4 = 20

, so

2 x = 16

and

x = 8

. Check: 24 + 4 = 28 and 8 + 20 = 28 ✓.

Answer: A) 8 kg

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