Question

Half of the sum of a number and three is nine

Answer 1

The unknown number is 15. The equation
`\((1)/(2)(x + 3) = 9\)`simplifies to
`\(x + 3 = 18\)`, yielding
`\(x = 15\)`.

Let's denote the unknown number as "x." The given statement can be expressed as an algebraic equation:

`\[ (1)/(2)(x + 3) = 9 \]`

To solve this equation, we can first multiply both sides by 2 to eliminate the fraction:

`\[ x + 3 = 18 \]`

Next, we can isolate the variable
`\( x \)` by subtracting 3 from both sides:

`\[ x = 15 \]`

Therefore, the unknown number is 15.

/--------\

| 9 |

| | Half

| |

+------+------+------+

| x | 3 | |

| | | |

|-------|-------|------|

Number +3 Sum