Answer
Only $x=2$ is a solution of the given equation.
Work Step by Step
Substitute each value of $x$ into the equation. If the resulting equation is true, then the number is a solution of the given equation.
$\text(a)$ Substitute $-1$ to $x$:
$\begin{align*}
x+1.5&=3.5\\
-1+1.5&=3.5\\
0.5&\not=3.5
\end{align*}$
Thus, $x=-1$ is NOT a solution of the given equation.
$\text(b)$ Substitute $2$ to $x$:
$\begin{align*}
x+1.5&=3.5\\
2+1.5&=3.5\\
3.5&=3.5
\end{align*}$
Thus, $x=2$ is a solution of the given equation.
