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a+b=21a+b=21

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Full solution

Q. a+b=21a+b=21
  1. Calculate tape needed: We got 8,0008,000 cm of tape needed and each roll has 2,0002,000 cm.
  2. Determine rolls required: So, we do 8,0008,000 divided by 2,0002,000 to find out the rolls needed.
  3. Perform division: That's 8,000÷2,0008,000 \div 2,000 equals... wait, it's 44, right?
  4. Order tape rolls: So the electrician needs to order 44 rolls of tape.

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