Answer
65 children
Step-by-step explanation
Let x = attendance of the last year
Then, twice the number that attended last year is equivalent to 2x
And twenty-three less than twice the number that attended last year is equivalent to 2x - 23
Therefore, this year's attendance, 107 children, is equal to:
[tex]107=2x-23[/tex]Solving for x:
[tex]\begin{gathered} 107+23=2x-23+23 \\ 130=2x \\ \frac{130}{2}=\frac{2x}{2} \\ 65=x \end{gathered}[/tex]