ANSWER:
19
STEP-BY-STEP EXPLANATION:
According to the statement we can establish the following equation:
Let n the number
[tex]\begin{gathered} 2\cdot\mleft(2+n\mright)=42 \\ \end{gathered}[/tex]Solving for n:
[tex]\begin{gathered} 2+n=\frac{42}{2} \\ n=21-2 \\ n=19 \end{gathered}[/tex]The number is 19
