Answer
The solution set is $\left\{14\right\}$.
Work Step by Step
Solve using the different properties of Algebra to find:
$3x=50-8
\\3x=42
\\x=\frac{42}{3}
\\x=14$
Check:
$3(14)+8\stackrel{?}{=}50
\\42+8\stackrel{?}{=}50
\\50 \stackrel{\checkmark}{=}50$
The solution set is $\left\{14\right\}$.
