Question 1172992
If x for the children and y for the adults, then this way:


{{{4x+5y<=880}}}

{{{y<=-(4/5)x+880}}}

and the other inequal,
{{{y>=-x+150}}}


x and y must be whole non-negative numbers.
{{{x>=0}}} and {{{y>=0}}}



You want a whole-numbered region satisfying this:
{{{system(y<=-(4/5)x+880,y>=-x+150,x>=0,y>=0)}}}