Collected 3972

Pupils collected 3,740 kg of scrap iron, 140 kg more than nine times what Palko himself collected. How much scrap did Palko collect?

Correct answer:

p =  400 kg

Step-by-step explanation:

3740 = 140 +9p

3740 = 140 +9·p

9p = 3600

p = 3600/9 = 400

p = 400

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