Question 1023240
x, how many junior uniforms
y, how many varsity uniforms


{{{x+y=42}}};


51x and 57y are the costs for the uniforms, and  {{{57y-51x=234}}} the cost difference.  The members of this equation are integrally divisible by 3, allowing simplification to  {{{19y-17x=78}}}.



{{{highlight(system(x+y=42,-17x+19y=78))}}}