Final answer:
The statement "Twice the sum of a number and 9 is 30" translates to the mathematical equation 2(x + 9) = 30, where x represents the unknown number.
Step-by-step explanation:
The given statement "Twice the sum of a number and 9 is 30" can be translated into a mathematical equation by performing the following steps:
- Let the unknown number be represented by the variable x.
- The phrase "the sum of a number and 9" can be represented as x + 9.
- The word "twice" indicates that the sum should be multiplied by 2, resulting in the expression 2(x + 9).
- The phrase "is" represents the equals sign in an equation, and "30" is the value we are setting the expression equal to.
- Putting it all together, we have the equation 2(x + 9) = 30.
Therefore, the mathematical equation that represents the given statement is 2(x + 9) = 30.