What function should I use to solve the inequality equations?

for example：

 {x1+x2=139 ;y1+y2=834 ; z1+z2=1390 } and
{12.5*x1+15*y1+14*z1<17000 ;
0.0286*x1+0.0315*y1+0.0297*z1<28.5 ;
12.5*x2+15*y2+14*z2<19500 ;
0.0286*x2+0.0315*y2+0.0297*z2<58}

all x1 x2 y1 y2 z1 z2 are positive integer

[Star Strider]

That is likely only possible in the Symbolic Math Toolbox (link).