using substitution in equation, Mathematics

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Harold used a 3% iodine solution and a 20% iodine solution, Harold used a 3...

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Example of hcf, Example  Find the Highest Common Factor of 54, 72...

Example  Find the Highest Common Factor of 54, 72 and 150. First we consider 54 and 72. The HCF for these two quantities is calculated as follows:

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