Question 1030907
x, Alicia's age;
y, her brother's age;


{{{y=-3+something}}}, for HE is three years younger...., and then the rest of the sentence goes,  
.
.
{{{y=-3+2x}}}



Next sentence becomes  {{{x+y=24}}}.


The system of equations is  {{{system(y=2x-3,x+y=24)}}}.