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What is the difference of twice a number and seven

User Bharath
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1 Answer

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The unknown number is found to be 8 by solving the equation 2x - 7 = 9. Verification confirms that substituting x = 8 satisfies the given condition, making 8 the solution.

Let's denote the unknown number as x. The given information can be translated into a mathematical expression. The problem states that the difference of twice the number and seven is 9. Mathematically, this can be represented as:

2x - 7 = 9

To solve for x, we can isolate x by adding 7 to both sides of the equation:

2x = 16

Then, divide both sides by 2 to find the value of x:

x = 8

Therefore, the unknown number is 8. To verify, substitute x = 8 back into the original equation:

2(8) - 7 = 16 - 7 = 9

The equation holds true, confirming that the solution is x = 8. Hence, the number is 8.

The probable question may be:

The difference of twice a number and seven is 9. Find the number.

User Thomas Theunen
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