Key Skill - Determine a value in a ratio when the difference between two amounts is given.

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"Determine a value in a ratio when the difference between two amounts is given."
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Could you use algebra also? If you make each part 'x' then Henry has 'x' pounds and Sam has '7x'. We also know that Sam has £84 more than Henry so Sam has 'x+84' pounds. Therefore 7x is the same as x+84.
7x = x+84
6x = 84
x = 14 --> each part 'x' is worth £14

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