Respuesta :
x = my age.
[tex] \bf 400-\stackrel{\textit{2 times my age}}{2x}~~\stackrel{is}{=}~~244\implies \stackrel{\textit{subtracting 400 from both sides}}{-2x=-156}\\\\\\x=\cfrac{-156}{-2}\implies x=78 [/tex]
x = my age.
[tex] \bf 400-\stackrel{\textit{2 times my age}}{2x}~~\stackrel{is}{=}~~244\implies \stackrel{\textit{subtracting 400 from both sides}}{-2x=-156}\\\\\\x=\cfrac{-156}{-2}\implies x=78 [/tex]