High School

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The sum of a number, [tex]x[/tex], and [tex]\frac{1}{2}[/tex] is equal to 4. Which set of equations correctly represents [tex]x[/tex]?

A.
\[
\begin{array}{l}
4 = x + \frac{1}{2} \\
x = 4 \frac{1}{2}
\end{array}
\]

B.
\[
\begin{array}{l}
4 = \frac{1}{2} x \\
x = 2
\end{array}
\]

C.
\[
\begin{array}{l}
4 = x + \frac{1}{2} \\
x = 3 \frac{1}{2}
\end{array}
\]

D.
\[
\begin{array}{l}
4 = \frac{1}{2} x \\
x = 8
\end{array}
\]

Answer :

We start with the equation:

[tex]$$
x + \frac{1}{2} = 4.
$$[/tex]

To isolate [tex]$x$[/tex], we subtract [tex]$\frac{1}{2}$[/tex] from both sides:

[tex]$$
x = 4 - \frac{1}{2}.
$$[/tex]

Now, subtracting gives:

[tex]$$
x = 3\frac{1}{2} \quad \text{or in decimal form} \quad x = 3.5.
$$[/tex]

Thus, the set of equations that correctly represents the situation is:

[tex]$$
\begin{aligned}
4 &= x + \frac{1}{2}, \\
x &= 3\frac{1}{2}.
\end{aligned}
$$[/tex]

This is the correct answer.

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