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The difference between 13 and a number is 7.

A number increased by 2 is 4.

The product of 2 and a number is 4.

A number decreased by 4 is 2.

A number divided by 4 is 2.

The sum of 20 and a number is 30.

A number increased by 10 is least 44.

35 is less than the difference of 21 and a number.

The quotient of 49 and number is 7.

28 decrease by a number is 18​