Sagot :
[tex]Let\ x\ be\ the\ family's\ monthly\ salary. \\ \\ Solution; \\ x\ \cdot30\%=Php\ 4,800 \\ \\ x= \frac{Php\ 4,800}{30\%} \\ \\ x= \frac{Php\ 4,800}{0.30} \\ \\ \boxed{\boxed{x=Php\ 16,000}} \\ \\ Hope\ it\ Helps:) \\ Domini[/tex]