The given equation is
[tex]3x+5x=64[/tex]
Since 3x and 5x are like terms, then we will add them
[tex]\begin{gathered} 3x+5x=64 \\ 8x=64 \end{gathered}[/tex]
Now, we will divide each side by 8 to find x
[tex]\begin{gathered} \frac{8x}{8}=\frac{64}{8} \\ x=8 \end{gathered}[/tex]
The answer is
x = 8
