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five (5) sweets ... 30p
seven (7) sweets ... x = ?

If you would like to know how much do seven (7) sweets cost, you can calculate this using the following steps:

5 * x = 7 * 30    
5 * x = 210   /5
x = 210 / 5
x = 42p

Result: Seven sweets will cost 42p.

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