15-X
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The expression for eleven decreased by a number can be written as 11 - x, where x represents the unknown number being subtracted from eleven. This expression represents the operation of subtraction, where the value of x will determine the final result after subtracting from eleven.
The algebraic expression for "4 decreased by the quotient of a number and 7" can be represented as 4 - (x/7), where x is the variable representing the number. The expression first calculates the quotient of the number and 7 by dividing x by 7, and then subtracts that quotient from 4. This expression captures the mathematical operation described in the question.
An expression that represents the quotient of a number and 7 can be written as "x/7" where x is the number. This expression signifies dividing the number x by 7. In algebraic terms, it represents a fraction where the numerator is the number being divided and the denominator is 7.
17 - y
11