Question
Some muffins are displayed an equal distance from one another on a table. The distance between the first and the seventh muffins is 30 cm. The distance between the tenth and the last muffin is 60 cm. How many muffins are there altogether?
4 m

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Some muffins are displayed an equal distance from one another on a table. The distance between the first and the seventh muffins is 30 cm. The distance between the tenth and the last muffin is 60 cm. How many muffins are there altogether?