Sally's brother Aaron is 15 years old. Carl is 8 years older than Aaron and the sum of their ages is 47 years. How old is sally? Show full algebraic working.
+26367 Sally's brother Aaron is 15 years old. Carl is 8 years older than Aaron and the sum of their ages is 47 years. How old is sally? Show full algebraic working.
$$\small{\text{$
\begin{array}{rcl}
\rm{Aaron~is~15~years~old}\\\\
\rm{Carl~=~8~years + Aaron}= 8 + 15 \\
\rm{Carl~is~23~years~old~}\\\\
\rm{Sally+Carl+Aaron}=47\\
\rm{Sally~}+23+15=47\\
\rm{Sally~}+38=47\\
\rm{Sally~}=47-38\\
\rm{Sally~}=9\\
\rm{Sally~is~9~years~old~}
\end{array}
$}}$$
+26367 Sally's brother Aaron is 15 years old. Carl is 8 years older than Aaron and the sum of their ages is 47 years. How old is sally? Show full algebraic working.
$$\small{\text{$
\begin{array}{rcl}
\rm{Aaron~is~15~years~old}\\\\
\rm{Carl~=~8~years + Aaron}= 8 + 15 \\
\rm{Carl~is~23~years~old~}\\\\
\rm{Sally+Carl+Aaron}=47\\
\rm{Sally~}+23+15=47\\
\rm{Sally~}+38=47\\
\rm{Sally~}=47-38\\
\rm{Sally~}=9\\
\rm{Sally~is~9~years~old~}
\end{array}
$}}$$
