What is the expression for an unknown number increased by 7?

What is the expression for an unknown number increased by 7?

• A. x + 6
• B. 7 + x
• C. x + 7
• D. x - 7

Answer: (C)

To determine the expression for an unknown number increased by 7, we start by defining the unknown number as \( x \). The phrase "increased by" indicates that we will add a certain number to \( x \) – in this case, 7. When we say "the unknown number increased by 7," it mathematically translates to adding 7 to \( x \). Therefore, the correct expression becomes \( x + 7 \). This aligns perfectly with the answer choice provided, as it directly reflects the operation described in the question: taking the unknown number \( x \) and adding 7 to it. Other expressions do not accurately depict this operation. For instance, subtracting from \( x \) or changing the order of addition would not capture the intended meaning of "increased by." Thus, the expression \( x + 7 \) is indeed the appropriate representation of the problem statement.

To determine the expression for an unknown number increased by 7, we start by defining the unknown number as ( x ). The phrase "increased by" indicates that we will add a certain number to ( x ) – in this case, 7.

When we say "the unknown number increased by 7," it mathematically translates to adding 7 to ( x ). Therefore, the correct expression becomes ( x + 7 ).

This aligns perfectly with the answer choice provided, as it directly reflects the operation described in the question: taking the unknown number ( x ) and adding 7 to it. Other expressions do not accurately depict this operation. For instance, subtracting from ( x ) or changing the order of addition would not capture the intended meaning of "increased by." Thus, the expression ( x + 7 ) is indeed the appropriate representation of the problem statement.