How would you express an unknown number multiplied by 6?

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

Answer: (B)

To express an unknown number multiplied by 6, you need to denote the unknown number with a variable, commonly represented by 'x'. When you multiply this variable 'x' by 6, the mathematical operation can be represented as 6 times x, which is written as 6x.

This notation conveys that whatever value 'x' holds, it is being multiplied by 6. For instance, if 'x' were to represent the number 2, then 6x would equate to 6 times 2, resulting in 12. This multiplication format is standard in algebra and simplifies the representation of that relationship between the unknown number and the number 6.

In contrast, the other expressions do not correctly represent the multiplication of an unknown number by 6. The option representing addition (6 + x) indicates a sum, while subtracting (x - 6) conveys a different operation altogether. Division (6 / x) denotes a fractional relationship rather than multiplication. Therefore, the correct way to express an unknown number multiplied by 6 is 6x.