Answer :

Let:

x = Unknown number

twice from the number of five and an unknown number is equal to 26, so:

[tex]\begin{gathered} 2(x+5)=26 \\ 2x+10=26 \\ 2x=26-10 \\ 2x=16 \\ x=\frac{16}{2} \\ x=8 \end{gathered}[/tex]

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