Let the number be \(x\)
\begin{aligned}
&\frac{(x+7) \times 5}{9}-3=12 \\
&\frac{5(x+7)}{9}=12+3 \\
&\frac{5(x+7)}{9}=15
\end{aligned}ivide through by 5
\begin{aligned}
&\frac{(x+7)}{9}=3 \\
&x+7=3 \times 9 \\
&x+4=27 \\
&x=27-7=20
\end{aligned}