Let:
x = Unknown number
The sum of 2 times a number and 4 can be expressed as:
[tex]2x+4[/tex]Since the result is 8, the equation is given by:
[tex]2x+4=8[/tex]Solve for x:
Subtract 4 from both sides:
[tex]\begin{gathered} 2x+4-4=8-4 \\ 2x=4 \end{gathered}[/tex]Divide both sides by 2:
[tex]\begin{gathered} \frac{2x}{2}=\frac{4}{2} \\ x=2 \end{gathered}[/tex]Answer:
x = 2
