Question 1168991
Only the number of hair-colorings and haircuts are important; the clients are not really part of the problem.


x coloring price
y haircuts price


{{{system(x+4y=234,2x+4y=316)}}}


E2-E1:
{{{x=316-234}}}
{{{highlight(x=82)}}}--------price for one hair-coloring job



{{{y=(316-2x)/4=(316-2*82)/4}}},..,..